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Catecholamine

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308: 47: 546: 33: 61: 74: 929:. The first step of the catabolic process is mediated by either MAO or COMT which depends on the tissue and location of catecholamines (for example degradation of catecholamines in the synaptic cleft is mediated by COMT because MAO is a mitochondrial enzyme). The next catabolic steps in the pathway involve 1174:
Catecholamines are secreted by cells in tissues of different systems of the human body, mostly by the nervous and the endocrine systems. The adrenal glands secrete certain catecholamines into the blood when the person is physically or mentally stressed and this is usually a healthy physiological
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converts norepinephrine into epinephrine. Thus, a cell that uses epinephrine as its transmitter contains four enzymes (TH, AADC, DBH, and PNMT), whereas norepinephrine neurons contain only three enzymes (lacking PNMT) and dopamine cells only two (TH and AADC).
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response. However, acute or chronic excess of circulating catecholamines can potentially increase blood pressure and heart rate to very high levels and eventually provoke dangerous effects. Tests for fractionated plasma free
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Catecholamine tests are done to identify rare tumors at the adrenal gland or in the nervous system. Catecholamine tests provide information relative to tumors such as: pheochromocytoma, paraganglioma, and neuroblastoma.
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Dopamine is the first catecholamine synthesized from DOPA. In turn, norepinephrine and epinephrine are derived from further metabolic modification of dopamine. The enzyme dopamine hydroxylase requires copper as a
2711: 921:-methyltransferase (COMT) which is present in the synaptic cleft and cytosol of the cell and monoamine oxidase (MAO) which is located in the mitochondrial membrane. Both enzymes require cofactors: COMT uses 1507:
Kitahama, K.; Pearson, J.; Denoroy, L.; Kopp, N.; Ulrich, J.; Maeda, T.; Jouvet, M. (1985). "Adrenergic neurons in human brain demonstrated by immunohistochemistry with antibodies to phenylethanolamine-
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extracts. CAs have been implicated to have a possible protective role against insect predators, injuries, and nitrogen detoxification. They have been shown to promote plant tissue growth, somatic
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Catecholamine is secreted into urine after being broken down, and its secretion level can be measured for the diagnosis of illnesses associated with catecholamine levels in the body.
824:, a metabolic disorder that leads to intellectual deficits unless treated by dietary manipulation. Catecholamine synthesis is usually considered to begin with tyrosine. The enzyme 1221: 497: 490: 2697: 307: 1334: 1985: 1141:"They have been found in 44 plant families, but no essential metabolic function has been established for them. They are precursors of benzophenanthridine 876:(DBH), which converts dopamine to yield norepinephrine, is also present. In still other neurons in which epinephrine is the transmitter, a third enzyme 1554:
Eisenhofer, G.; Kopin, I. J.; Goldstein, D. S. (2004). "Catecholamine metabolism: a contemporary view with implications for physiology and medicine".
778:(not shown in the diagram). The rate limiting step in catecholamine biosynthesis through the predominant metabolic pathway is the hydroxylation of 1187:
that don't adequately respond to treatment. Each of the tests measure the amount of adrenaline and noradrenaline metabolites, respectively called
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and then to dopamine. Depending on the cell type, dopamine may be further converted to norepinephrine or even further converted to epinephrine.
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is a neuromodulator of the peripheral sympathetic nervous system but is also present in the blood (mostly through "spillover" from the
2886: 2838: 1226: 3258: 3253: 1117:-inhibitor), raise the levels of all the catecholamines. Increased catecholamines may also cause an increased respiratory rate ( 3574: 2868: 2795: 1978: 567: 893:
Catecholamines have a half-life of a few minutes when circulating in the blood. They can be degraded either by methylation by
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Purves, D.; Augustine, G. J.; Fitzpatrick, D.; Hall, W. C.; LaMantia, A. S.; McNamara, J. O.; White, L. E., eds. (2008).
852:(AADC; see Cooper et al., 2002) to the transmitter dopamine. This step occurs so rapidly that it is difficult to measure 3588: 2422: 2397: 2037: 520: 2896: 2853: 3030: 2958: 1058:. As MAO-A is one of the enzymes responsible for degradation of these neurotransmitters, its deficiency increases the 926: 571: 3614: 3263: 3120: 3066: 2963: 2843: 1971: 1342: 1106: 1025: 706: 142: 3335: 3007: 2490: 2177: 2108: 873: 817: 642: 534: 527: 231: 3624: 3345: 2427: 1957: 1179:
or the urine metanephrines are used to confirm or exclude certain diseases when the doctor identifies signs of
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Manor, I.; Tyano, S.; Mel, E.; Eisenberg, J.; Bachner-Melman, R.; Kotler, M.; Ebstein, R. P. (2002).
1154: 1125: 1067: 1036: 998: 922: 864:-DOPA to dopamine is the final step in formation of the transmitter; however, in those neurons using 825: 798: 702: 633:
as the cofactor. Dopamine itself is also used as precursor in the synthesis of the neurotransmitters
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Lindemann L, Hoener MC (May 2005). "A renaissance in trace amines inspired by a novel GPCR family".
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Catecholamines cause general physiological changes that prepare the body for physical activity (the
3300: 3002: 2940: 1074:, but it looks similar to carcinoid syndrome with symptoms such as facial flushing and aggression. 1051: 820:, found in large amounts in the liver. Insufficient amounts of phenylalanine hydroxylase result in 775: 630: 603: 583: 3407: 3204: 2442: 2283: 2262: 2211: 1835: 1670:
Brunner, H. G. (1996). "MAOA Deficiency and Abnormal Behaviour: Perspectives on an Association".
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is produced in small groups of neurons in the human brain which express its synthesizing enzyme,
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or in the associated compound articles. For TAAR2 and TAAR5 agonists and inverse agonists, see
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Joh, T. H.; Hwang, O. (1987). "Dopamine Beta-Hydroxylase: Biochemistry and Molecular Biology".
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Chu, Brianna; Marwaha, Komal; Sanvictores, Terrence; Awosika, Ayoola O.; Ayers, Derek (2024),
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Extremely high levels of catecholamines (also known as catecholamine toxicity) can occur in
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group. Phenylethanolamines such as norepinephrine have a hydroxyl group on the ethyl chain.
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bind to MAO, thereby preventing it from breaking down catecholamines and other monoamines.
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and the brain. In mammals, tyrosine can be formed from dietary phenylalanine by the enzyme
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Wang X, Li J, Dong G, Yue J (February 2014). "The endogenous substrates of brain CYP2D".
1283: 1511:-methyltransferase (PNMT): discovery of a new group in the nucleus tractus solitarius". 812:
are precursors for catecholamines. Both amino acids are found in high concentrations in
192:. Catecholamines are water-soluble and are 50% bound to plasma proteins in circulation. 3511: 3199: 3140: 2830: 2810: 2764: 2670: 2288: 2231: 2196: 2062: 1877: 1737: 1712: 1369: 1246: 1236: 1198:
Blood tests are also done to analyze the amount of catecholamines present in the body.
1098: 997:, which can be induced from psychological reactions or environmental stressors such as 983: 967: 865: 758: 738: 634: 382: 355: 200: 51: 32: 17: 1161:
biosynthesis. They have also been shown to enhance synergistically various effects of
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Broadley KJ (March 2010). "The vascular effects of trace amines and amphetamines".
1188: 1180: 1006: 813: 730: 261: 2129: 1926: 60: 1482: 721:, is largely produced in neuronal cell bodies in two areas of the brainstem: the 3559: 3415: 3373: 3355: 3248: 3152: 3135: 3111: 3017: 2878: 2768: 2467: 2139: 2042: 1184: 1162: 869: 742: 638: 300: 296: 269: 196: 175: 37: 1598: 1447: 753:; these neurons project from a nucleus that is adjacent (ventrolateral) to the 3383: 3285: 3275: 3214: 3209: 2950: 2935: 2914: 2778: 2509: 2457: 2417: 2298: 2293: 2275: 2221: 2002: 1679: 1094: 914: 551: 420: 410: 347: 182: 162: 3393: 3378: 3290: 3145: 3130: 2986: 2982: 2927: 2918: 2740: 2526: 2330: 2236: 2149: 1765: 1728: 1118: 1110: 1078: 1021: 733:-pigmented neurons. The similarly neuromelanin-pigmented cell bodies of the 245: 1746: 1656: 1610: 1575: 1490: 1455: 1420: 1697: 1647: 1630: 1532: 1377: 73: 3125: 2787: 2760: 2752: 2447: 2311: 2216: 2027: 1158: 1142: 971: 809: 710: 656:
as cofactors. Norepinephrine is converted into epinephrine by the enzyme
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of a larger molecule, where it represents a 1,2-dihydroxybenzene group.
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of these neurotransmitters considerably. It occurs in the absence of
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References for all endogenous human TAAR1 ligands are provided at
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Kuklin, A. I.; Conger, B. V. (1995). "Catecholamines in Plants".
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In humans, catecholamines (shown in yellow) are derived from the
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Extremely high levels of catecholamine can also be caused by
1032:, this occurrence is widely known as a "catecholamine dump". 840:-tyrosine by TH results in the formation of the DA precursor 982:
and as hormones in the blood circulation. The catecholamine
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of catecholamines is mediated by two main enzymes: catechol-
774:(not shown in the diagram) and DOPA decarboxylase requires 641:. Dopamine is converted into norepinephrine by the enzyme 120: 114: 105: 1341:. San Diego, CA: University of California. Archived from 99: 3569:
References for synthetic TAAR1 agonists can be found at
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Stewart, M. F.; Croft, J.; Reed, P.; New, J. P. (2006).
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High catecholamine levels in blood are associated with
941:. The end product of epinephrine and norepinephrine is 860:
that use DA as the transmitter, the decarboxylation of
1313:(4th ed.). Sinauer Associates. pp. 137–138. 1222:
Catecholaminergic polymorphic ventricular tachycardia
1145:, which are the active principal ingredients of many 856:-DOPA in the brain without first inhibiting AADC. In 789:
Catecholamine synthesis is inhibited by alpha-methyl-
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High levels of catecholamines can also be caused by
284: 117: 102: 3534: 3520: 3492: 3483: 3465: 3455: 3446: 3424: 3406: 3241: 3110: 3101: 3092: 3016: 2981: 2949: 2926: 2913: 2877: 2829: 2786: 2777: 2739: 2730: 2635: 2601: 2581: 2574: 2562: 2525: 2518: 2508: 2476: 2385: 2375: 2343: 2323: 2245: 2204: 2195: 2168: 2117: 2091: 2020: 2011: 2001: 1153:from in vitro cultures, and flowering. CAs inhibit 123: 108: 2887:3,4-Dihydroxyphenylglycolaldehyde (DOPEGAL, DHMAL) 2839:3,4-Dihydroxyphenylglycolaldehyde (DOPEGAL, DHMAL) 2811:Hydroxytyrosol (3,4-dihydroxyphenylethanol; DOPET) 949:. Dopamine catabolism leads to the production of 2864:3,4-Dihydroxyphenylethylene glycol (DOPEG, DHPG) 260:Catecholamines have the distinct structure of a 1605:, Treasure Island (FL): StatPearls Publishing, 1139: 757:and from a nucleus in the dorsal region of the 621:-DOPA is converted into dopamine by the enzyme 1854:"Plasma Free Metanephrines | Lab Tests Online" 1288:Greenspan's Basic & Clinical Endocrinology 3067: 3026:3-Methoxy-4-hydroxyphenylacetaldehyde (HMPAL) 2869:3-Methoxy-4-hydroxyphenylglycol (MHPG, MOPEG) 2705: 1979: 1672:Genetics of Criminal and Antisocial Behaviour 1284:"Chapter 11. Adrenal Medulla and Paraganglia" 8: 1024:, in particular, those nuclei affecting the 832:-tyrosine into 3,4-dihydroxyphenylalanine ( 3489: 3452: 3107: 3098: 3074: 3060: 3052: 2923: 2783: 2736: 2712: 2698: 2690: 2632: 2598: 2578: 2569: 2522: 2515: 2482: 2382: 2349: 2201: 2017: 2008: 1986: 1972: 1964: 1762:Health assessment and physical examination 1358:Annals of the New York Academy of Sciences 693:Catecholamines are produced mainly by the 226:Tyrosine is created from phenylalanine by 2897:3-Methoxy-4-hydroxymandelaldehyde (MHMAL) 2854:3-Methoxy-4-hydroxymandelaldehyde (MHMAL) 1956:at the U.S. National Library of Medicine 1736: 1646: 1286:. In Gardner, D. G.; Shoback, D. (eds.). 1093:). Some typical effects are increases in 872:(adrenaline) as transmitters, the enzyme 1878:"Urine Metanephrines | Lab Tests Online" 211:epinephrine and norepinephrine from the 72: 29: 2796:3,4-Dihydroxyphenylacetaldehyde (DOPAL) 1903:"Catecholamine Urine & Blood Tests" 1274: 1016:trauma due to stimulation or damage of 2801:3,4-Dihydroxyphenylacetic acid (DOPAC) 1105:levels, and a general reaction of the 568:aromatic amino acid hydroxylase (AAAH) 161:side groups next to each other) and a 3083:Human trace amine-associated receptor 1290:(9th ed.). New York: McGraw-Hill 7: 3008:5-Methoxyindoleacetaldehyde (5-MIAL) 2998:-Acetylserotonin (NAS; normelatonin) 2959:5-Hydroxyindoleacetaldehyde (5-HIAL) 1128:for catecholamine is used to detect 181:Catecholamines are derived from the 31: 2964:5-Hydroxyindoleacetic acid (5-HIAA) 1081:can cause elevated catecholamines. 174:can be either a free molecule or a 3031:4-Hydroxyphenylacetaldehyde (HPAL) 1820:Journal of Plant Growth Regulation 1436:Trends in Pharmacological Sciences 1370:10.1111/j.1749-6632.1987.tb27217.x 195:Included among catecholamines are 25: 3374:Ralmitaront (RG-7906, RO-6889450) 2844:3,4-Dihydroxymandelic acid (DHMA) 1227:History of catecholamine research 1043:, a treatable condition known as 562:-Phenylalanine is converted into 1471:European Journal of Pharmacology 1413:10.1016/j.pharmthera.2009.11.005 627:-amino acid decarboxylase (AADC) 544: 306: 89: 59: 45: 1401:Pharmacology & Therapeutics 844:-DOPA, which is metabolized by 729:, the latter of which contains 252:) are catecholamine analogues. 3141:Norepinephrine (noradrenaline) 2232:Norepinephrine (noradrenaline) 598:-DOPA by another AAAH enzyme ( 1: 3589:Receptor/signaling modulators 1717:Journal of Clinical Pathology 1599:"Physiology, Stress Reaction" 925:as a cofactor while MAO uses 836:-DOPA). The hydroxylation of 828:(TH) converts the amino acid 2969:5-Hydroxytryptophol (5-HTOL) 1525:10.1016/0304-3940(85)90555-5 1483:10.1016/j.ejphar.2013.12.025 990:of the sympathetic system). 643:dopamine β-hydroxylase (DBH) 594:-Tyrosine is converted into 3121:monoamine neurotransmitters 2941:5-Hydroxytryptophan (5-HTP) 2859:Vanillylmandelic acid (VMA) 1052:monoamine oxidase A (MAO-A) 943:vanillylmandelic acid (VMA) 572:phenylalanine 4-hydroxylase 248:drugs (such as a number of 27:Class of chemical compounds 3641: 3003:5-Methoxytryptamine (5-MT) 1448:10.1016/j.tips.2005.03.007 1282:Fitzgerald, P. A. (2011). 1170:Testing for catecholamines 1107:sympathetic nervous system 1026:sympathetic nervous system 899:-methyltransferases (COMT) 707:sympathetic nervous system 291:Biosynthetic pathways for 280:Production and degradation 143:monoamine neurotransmitter 3554: 2485: 2352: 2038:Glutamic acid (glutamate) 2033:Aspartic acid (aspartate) 1794:"Catecholamines in Urine" 1680:10.1002/9780470514825.ch9 945:which is excreted in the 882:-methyltransferase (PNMT) 850:-amino acid decarboxylase 818:phenylalanine hydroxylase 232:phenylalanine hydroxylase 3136:Epinephrine (adrenaline) 3036:Indoleacetaldehyde (IAL) 2816:3-Methoxytyramine (3-MT) 2222:Epinephrine (adrenaline) 1958:Medical Subject Headings 1091:fight-or-flight response 903:monoamine oxidases (MAO) 268:groups, an intermediate 250:substituted amphetamines 221:fight-or-flight response 3271:-Dimethylphenethylamine 2821:Homovanillic acid (HVA) 2724:metabolic intermediates 1729:10.1136/jcp.2005.032722 1556:Pharmacological Reviews 951:homovanillic acid (HVA) 18:Catecholamine synthesis 3394:Ulotaront (SEP-363856) 3336:β-Methylphenethylamine 3331:4-Methylphenethylamine 3326:3-Methylphenethylamine 3321:2-Methylphenethylamine 3041:Phenacetaldehyde (PAL) 2657:Carbonyl sulfide (COS) 2258:N-Methylphenethylamine 1167: 1157:oxidation and enhance 1014:central nervous system 1007:low blood sugar levels 980:central nervous system 935:aldehyde dehydrogenase 874:dopamine β-hydroxylase 723:ventral tegmental area 719:central nervous system 600:tyrosine 3-hydroxylase 272:chain, and a terminal 80: 3316:MDMA (midomafetamine) 3242:Synthetic and natural 3171:-Methylphenethylamine 2398:2-AGE (noladin ether) 1648:10.1038/sj.mp.4001037 1262:Vanillylmandelic acid 1068:neuroendocrine tumors 1054:deficiency, known as 1037:neuroendocrine tumors 999:elevated sound levels 931:alcohol dehydrogenase 901:or by deamination by 703:postganglionic fibers 394:-Methylphenethylamine 203:(noradrenaline), and 76: 3560:List of trace amines 3296:4-Hydroxyamphetamine 2806:Homovanillyl alcohol 2609:Carbon monoxide (CO) 1760:Estes, Mary (2016). 1635:Molecular Psychiatry 1513:Neuroscience Letters 1155:indole-3-acetic acid 966:Two catecholamines, 826:tyrosine hydroxylase 799:tyrosine hydroxylase 3521:Neutral antagonists 3507:-Dimethylethylamine 3466:Neutral antagonists 3408:Neutral antagonists 3311:MDA (tenamfetamine) 3301:Isopropyloctopamine 2614:Hydrogen sulfide (H 2468:Virodhamine (O-AEA) 1217:-methyl transferase 1109:. Some drugs, like 878:phenylethanolamine 868:(noradrenaline) or 747:phenylethanolamine 658:phenylethanolamine 631:pyridoxal phosphate 617:(Fe) as cofactors. 604:tetrahydrobiopterin 584:tetrahydrobiopterin 3205:Phenylethanolamine 2671:Sulfur dioxide (SO 2582:Cholinergic system 2284:Phenylethanolamine 2263:N-Methyltryptamine 2227:NAS (normelatonin) 2014:inhibitory systems 2012:Major excitatory / 1931:labtestsonline.org 1882:labtestsonline.org 1858:labtestsonline.org 1832:10.1007/BF00203119 1136:Function in plants 1072:carcinoid syndrome 1030:emergency medicine 939:aldehyde reductase 797:), which inhibits 751:-methyltransferase 713:, which acts as a 662:-methyltransferase 574:), with molecular 81: 3615:Neurotransmitters 3597: 3596: 3592: 3578: 3562: 3550: 3549: 3542:3-Iodothyronamine 3479: 3478: 3442: 3441: 3434:EPPTB (RO5212773) 3402: 3401: 3163:3-Methoxytyramine 3158:3-Iodothyronamine 3049: 3048: 2977: 2976: 2909: 2908: 2905: 2904: 2687: 2686: 2683: 2682: 2631: 2630: 2623:Nitric oxide (NO) 2597: 2596: 2570: 2558: 2557: 2554: 2553: 2504: 2503: 2500: 2499: 2371: 2370: 2367: 2366: 2339: 2338: 2253:3-Iodothyronamine 2191: 2190: 1995:Neurotransmitters 1884:. 6 December 2019 1779:978-0-17-035484-4 1689:978-0-470-51482-5 1568:10.1124/pr.56.3.1 1345:on July 16, 2011. 1320:978-0-87893-697-7 863: 855: 849: 843: 839: 835: 831: 785: 781: 682: 681: 672: 653: 626: 620: 597: 593: 565: 561: 556: 428:3-Methoxytyramine 339: 329: 319: 238: 207:. Release of the 71: 70: 16:(Redirected from 3632: 3583: 3568: 3557: 3535:Inverse agonists 3490: 3453: 3426:Inverse agonists 3108: 3099: 3076: 3069: 3062: 3053: 2924: 2784: 2737: 2721:Neurotransmitter 2714: 2707: 2700: 2691: 2662:Nitrous oxide (N 2633: 2602:Gasotransmitters 2599: 2579: 2523: 2516: 2483: 2418:Anandamide (AEA) 2386:Endocannabinoids 2383: 2350: 2237:Serotonin (5-HT) 2202: 2021:Glutamate system 2018: 2009: 1988: 1981: 1974: 1965: 1941: 1940: 1938: 1937: 1927:"Catecholamines" 1923: 1917: 1916: 1914: 1913: 1899: 1893: 1892: 1890: 1889: 1874: 1868: 1867: 1865: 1864: 1850: 1844: 1843: 1815: 1809: 1808: 1806: 1804: 1790: 1784: 1783: 1764:(2nd ed.). 1757: 1751: 1750: 1740: 1708: 1702: 1701: 1667: 1661: 1660: 1650: 1626: 1620: 1619: 1618: 1617: 1594: 1588: 1587: 1551: 1545: 1544: 1504: 1495: 1494: 1466: 1460: 1459: 1431: 1425: 1424: 1396: 1390: 1389: 1353: 1347: 1346: 1335:"Catecholamines" 1331: 1325: 1324: 1306: 1300: 1299: 1297: 1295: 1279: 1257:Sympathomimetics 1130:pheochromocytoma 1064:pheochromocytoma 1056:Brunner syndrome 1045:pheochromocytoma 861: 853: 847: 841: 837: 833: 829: 804:The amino acids 783: 779: 727:substantia nigra 715:neurotransmitter 695:chromaffin cells 675:as the cofactor. 670: 651: 624: 618: 595: 591: 566:-tyrosine by an 563: 559: 554: 548: 547: 537: 530: 523: 516: 509: 500: 493: 486: 479: 472: 465: 458: 451: 444: 437: 430: 423: 416: 406: 396: 386: 385: 377: 376: 368: 358: 351: 350: 342: 337: 332: 327: 322: 317: 310: 285: 236: 147:organic compound 136: 135: 132: 131: 128: 125: 122: 119: 116: 113: 110: 107: 104: 101: 98: 95: 63: 54:(Noradrenaline) 49: 35: 30: 21: 3640: 3639: 3635: 3634: 3633: 3631: 3630: 3629: 3625:Stress hormones 3600: 3599: 3598: 3593: 3581: 3579: 3577:for references. 3565: 3563: 3546: 3530: 3516: 3475: 3461: 3438: 3420: 3398: 3369:Propylhexedrine 3351:Norfenfluramine 3341:Methamphetamine 3237: 3179:-Methyltyramine 3088: 3080: 3050: 3045: 3012: 2973: 2945: 2901: 2873: 2849:Normetanephrine 2825: 2773: 2757:DOPA (levodopa) 2726: 2718: 2688: 2679: 2674: 2665: 2651: 2627: 2617: 2593: 2550: 2496: 2472: 2363: 2335: 2319: 2241: 2197:Biogenic amines 2187: 2164: 2113: 2087: 2013: 1997: 1992: 1950: 1945: 1944: 1935: 1933: 1925: 1924: 1920: 1911: 1909: 1901: 1900: 1896: 1887: 1885: 1876: 1875: 1871: 1862: 1860: 1852: 1851: 1847: 1817: 1816: 1812: 1802: 1800: 1792: 1791: 1787: 1780: 1772:. p. 143. 1759: 1758: 1754: 1710: 1709: 1705: 1690: 1669: 1668: 1664: 1628: 1627: 1623: 1615: 1613: 1596: 1595: 1591: 1562:(56): 331–349. 1553: 1552: 1548: 1506: 1505: 1498: 1468: 1467: 1463: 1433: 1432: 1428: 1398: 1397: 1393: 1355: 1354: 1350: 1333: 1332: 1328: 1321: 1308: 1307: 1303: 1293: 1291: 1281: 1280: 1276: 1271: 1266: 1252:Steroid hormone 1247:Phenethylamines 1242:Peptide hormone 1208: 1193:normetanephrine 1172: 1147:medicinal plant 1138: 1121:) in patients. 1087: 1060:bioavailability 1041:adrenal medulla 976:neuromodulators 964: 959: 891: 822:phenylketonuria 767: 735:locus coeruleus 699:adrenal medulla 691: 685: 683: 678: 677: 676: 648: 609: 581: 558: 557:-phenylalanine. 549: 541: 540: 539: 538: 533: 531: 526: 524: 519: 517: 514: 512: 510: 505: 503: 501: 496: 494: 489: 487: 482: 480: 475: 473: 468: 466: 461: 459: 456: 454: 452: 447: 445: 440: 438: 433: 431: 426: 424: 419: 417: 409: 407: 404:-Methyltyramine 399: 397: 389: 387: 381: 380: 378: 372: 371: 369: 361: 359: 354: 352: 346: 345: 343: 335: 333: 325: 323: 315: 311: 303: 282: 258: 219:is part of the 213:adrenal medulla 92: 88: 64: 50: 36: 28: 23: 22: 15: 12: 11: 5: 3638: 3636: 3628: 3627: 3622: 3620:TAAR1 agonists 3617: 3612: 3610:Catecholamines 3602: 3601: 3595: 3594: 3567: 3556: 3555: 3552: 3551: 3548: 3547: 3545: 3544: 3538: 3536: 3532: 3531: 3529: 3528: 3524: 3522: 3518: 3517: 3515: 3514: 3512:Trimethylamine 3509: 3496: 3494: 3487: 3481: 3480: 3477: 3476: 3474: 3473: 3469: 3467: 3463: 3462: 3459: 3457: 3450: 3444: 3443: 3440: 3439: 3437: 3436: 3430: 3428: 3422: 3421: 3419: 3418: 3412: 3410: 3404: 3403: 3400: 3399: 3397: 3396: 3391: 3386: 3381: 3376: 3371: 3366: 3358: 3353: 3348: 3343: 3338: 3333: 3328: 3323: 3318: 3313: 3308: 3303: 3298: 3293: 3288: 3283: 3278: 3273: 3261: 3256: 3251: 3245: 3243: 3239: 3238: 3236: 3235: 3234: 3233: 3225: 3217: 3212: 3207: 3202: 3200:Phenethylamine 3197: 3189: 3181: 3173: 3165: 3160: 3150: 3149: 3148: 3143: 3138: 3133: 3128: 3116: 3114: 3105: 3096: 3090: 3089: 3081: 3079: 3078: 3071: 3064: 3056: 3047: 3046: 3044: 3043: 3038: 3033: 3028: 3022: 3020: 3014: 3013: 3011: 3010: 3005: 3000: 2991: 2989: 2979: 2978: 2975: 2974: 2972: 2971: 2966: 2961: 2955: 2953: 2947: 2946: 2944: 2943: 2938: 2932: 2930: 2921: 2911: 2910: 2907: 2906: 2903: 2902: 2900: 2899: 2894: 2889: 2883: 2881: 2875: 2874: 2872: 2871: 2866: 2861: 2856: 2851: 2846: 2841: 2835: 2833: 2831:Norepinephrine 2827: 2826: 2824: 2823: 2818: 2813: 2808: 2803: 2798: 2792: 2790: 2781: 2775: 2774: 2772: 2771: 2765:Norepinephrine 2745: 2743: 2734: 2732:Catecholamines 2728: 2727: 2719: 2717: 2716: 2709: 2702: 2694: 2685: 2684: 2681: 2680: 2678: 2677: 2672: 2668: 2663: 2659: 2654: 2649: 2645: 2639: 2637: 2629: 2628: 2626: 2625: 2620: 2615: 2611: 2605: 2603: 2595: 2594: 2592: 2591: 2585: 2583: 2576: 2572: 2571: 2567: 2560: 2559: 2556: 2555: 2552: 2551: 2549: 2548: 2543: 2538: 2532: 2530: 2520: 2513: 2506: 2505: 2502: 2501: 2498: 2497: 2495: 2494: 2486: 2480: 2474: 2473: 2471: 2470: 2465: 2460: 2455: 2450: 2445: 2440: 2435: 2430: 2425: 2420: 2415: 2410: 2405: 2400: 2395: 2389: 2387: 2380: 2373: 2372: 2369: 2368: 2365: 2364: 2362: 2361: 2353: 2347: 2341: 2340: 2337: 2336: 2334: 2333: 2327: 2325: 2321: 2320: 2318: 2317: 2309: 2301: 2296: 2291: 2289:Phenethylamine 2286: 2281: 2273: 2265: 2260: 2255: 2249: 2247: 2243: 2242: 2240: 2239: 2234: 2229: 2224: 2219: 2214: 2208: 2206: 2199: 2193: 2192: 2189: 2188: 2186: 2185: 2180: 2174: 2172: 2166: 2165: 2163: 2162: 2157: 2152: 2147: 2142: 2137: 2132: 2127: 2121: 2119: 2118:Glycine system 2115: 2114: 2112: 2111: 2106: 2101: 2095: 2093: 2089: 2088: 2086: 2085: 2080: 2075: 2070: 2065: 2063:Kynurenic acid 2060: 2055: 2050: 2045: 2040: 2035: 2030: 2024: 2022: 2015: 2006: 1999: 1998: 1993: 1991: 1990: 1983: 1976: 1968: 1962: 1961: 1954:Catecholamines 1949: 1948:External links 1946: 1943: 1942: 1918: 1894: 1869: 1845: 1810: 1785: 1778: 1752: 1723:(8): 935–936. 1703: 1688: 1662: 1641:(6): 626–632. 1621: 1589: 1546: 1519:(3): 303–308. 1496: 1461: 1442:(5): 274–281. 1426: 1407:(3): 363–375. 1391: 1348: 1339:Health Library 1326: 1319: 1301: 1273: 1272: 1270: 1267: 1265: 1264: 1259: 1254: 1249: 1244: 1239: 1237:Julius Axelrod 1234: 1229: 1224: 1219: 1209: 1207: 1204: 1171: 1168: 1137: 1134: 1099:blood pressure 1086: 1083: 984:norepinephrine 968:norepinephrine 963: 960: 958: 955: 890: 887: 866:norepinephrine 766: 763: 759:solitary tract 739:norepinephrine 690: 687: 680: 679: 654:-ascorbic acid 646: 635:norepinephrine 607: 579: 543: 542: 532: 525: 518: 511: 502: 495: 488: 481: 474: 467: 460: 453: 446: 439: 432: 425: 418: 408: 398: 388: 383:Norepinephrine 379: 370: 360: 356:Phenethylamine 353: 344: 334: 324: 320:-Phenylalanine 314: 313: 312: 305: 304: 293:catecholamines 290: 289: 288: 283: 281: 278: 257: 254: 230:by the enzyme 217:adrenal glands 201:norepinephrine 199:(adrenaline), 137:; abbreviated 69: 68: 56: 55: 52:Norepinephrine 42: 41: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 3637: 3626: 3623: 3621: 3618: 3616: 3613: 3611: 3608: 3607: 3605: 3591: 3590: 3587: 3582: 3576: 3572: 3566: 3561: 3553: 3543: 3540: 3539: 3537: 3533: 3526: 3525: 3523: 3519: 3513: 3510: 3508: 3506: 3502: 3498: 3497: 3495: 3491: 3488: 3486: 3482: 3471: 3470: 3468: 3464: 3458: 3454: 3451: 3449: 3445: 3435: 3432: 3431: 3429: 3427: 3423: 3417: 3414: 3413: 3411: 3409: 3405: 3395: 3392: 3390: 3387: 3385: 3382: 3380: 3377: 3375: 3372: 3370: 3367: 3365: 3363: 3359: 3357: 3354: 3352: 3349: 3347: 3344: 3342: 3339: 3337: 3334: 3332: 3329: 3327: 3324: 3322: 3319: 3317: 3314: 3312: 3309: 3307: 3304: 3302: 3299: 3297: 3294: 3292: 3289: 3287: 3284: 3282: 3279: 3277: 3274: 3272: 3270: 3266: 3262: 3260: 3257: 3255: 3252: 3250: 3247: 3246: 3244: 3240: 3232: 3230: 3226: 3224: 3222: 3218: 3216: 3213: 3211: 3208: 3206: 3203: 3201: 3198: 3196: 3194: 3190: 3188: 3186: 3182: 3180: 3178: 3174: 3172: 3170: 3166: 3164: 3161: 3159: 3156: 3155: 3154: 3151: 3147: 3144: 3142: 3139: 3137: 3134: 3132: 3129: 3127: 3124: 3123: 3122: 3118: 3117: 3115: 3113: 3109: 3106: 3104: 3100: 3097: 3095: 3091: 3087: 3084: 3077: 3072: 3070: 3065: 3063: 3058: 3057: 3054: 3042: 3039: 3037: 3034: 3032: 3029: 3027: 3024: 3023: 3021: 3019: 3015: 3009: 3006: 3004: 3001: 2999: 2997: 2993: 2992: 2990: 2988: 2984: 2980: 2970: 2967: 2965: 2962: 2960: 2957: 2956: 2954: 2952: 2948: 2942: 2939: 2937: 2934: 2933: 2931: 2929: 2925: 2922: 2920: 2916: 2912: 2898: 2895: 2893: 2890: 2888: 2885: 2884: 2882: 2880: 2876: 2870: 2867: 2865: 2862: 2860: 2857: 2855: 2852: 2850: 2847: 2845: 2842: 2840: 2837: 2836: 2834: 2832: 2828: 2822: 2819: 2817: 2814: 2812: 2809: 2807: 2804: 2802: 2799: 2797: 2794: 2793: 2791: 2789: 2785: 2782: 2780: 2776: 2770: 2766: 2762: 2758: 2754: 2750: 2749:Phenylalanine 2747: 2746: 2744: 2742: 2738: 2735: 2733: 2729: 2725: 2722: 2715: 2710: 2708: 2703: 2701: 2696: 2695: 2692: 2676: 2669: 2667: 2660: 2658: 2655: 2653: 2646: 2644: 2641: 2640: 2638: 2634: 2624: 2621: 2619: 2612: 2610: 2607: 2606: 2604: 2600: 2590: 2589:Acetylcholine 2587: 2586: 2584: 2580: 2577: 2575:Miscellaneous 2573: 2568: 2565: 2561: 2547: 2544: 2542: 2539: 2537: 2534: 2533: 2531: 2528: 2524: 2521: 2517: 2514: 2511: 2507: 2492: 2488: 2487: 2484: 2481: 2479: 2478:Neurosteroids 2475: 2469: 2466: 2464: 2461: 2459: 2456: 2454: 2451: 2449: 2446: 2444: 2441: 2439: 2436: 2434: 2431: 2429: 2426: 2424: 2421: 2419: 2416: 2414: 2411: 2409: 2406: 2404: 2401: 2399: 2396: 2394: 2391: 2390: 2388: 2384: 2381: 2378: 2374: 2359: 2355: 2354: 2351: 2348: 2346: 2345:Neuropeptides 2342: 2332: 2329: 2328: 2326: 2322: 2316: 2314: 2310: 2308: 2306: 2302: 2300: 2297: 2295: 2292: 2290: 2287: 2285: 2282: 2280: 2278: 2274: 2272: 2270: 2266: 2264: 2261: 2259: 2256: 2254: 2251: 2250: 2248: 2244: 2238: 2235: 2233: 2230: 2228: 2225: 2223: 2220: 2218: 2215: 2213: 2210: 2209: 2207: 2203: 2200: 2198: 2194: 2184: 2181: 2179: 2176: 2175: 2173: 2171: 2167: 2161: 2158: 2156: 2153: 2151: 2148: 2146: 2143: 2141: 2138: 2136: 2133: 2131: 2128: 2126: 2123: 2122: 2120: 2116: 2110: 2107: 2105: 2102: 2100: 2097: 2096: 2094: 2090: 2084: 2081: 2079: 2076: 2074: 2071: 2069: 2066: 2064: 2061: 2059: 2056: 2054: 2051: 2049: 2046: 2044: 2041: 2039: 2036: 2034: 2031: 2029: 2026: 2025: 2023: 2019: 2016: 2010: 2007: 2004: 2000: 1996: 1989: 1984: 1982: 1977: 1975: 1970: 1969: 1966: 1959: 1955: 1952: 1951: 1947: 1932: 1928: 1922: 1919: 1908: 1904: 1898: 1895: 1883: 1879: 1873: 1870: 1859: 1855: 1849: 1846: 1841: 1837: 1833: 1829: 1825: 1821: 1814: 1811: 1799: 1795: 1789: 1786: 1781: 1775: 1771: 1767: 1763: 1756: 1753: 1748: 1744: 1739: 1734: 1730: 1726: 1722: 1718: 1714: 1707: 1704: 1699: 1695: 1691: 1685: 1681: 1677: 1673: 1666: 1663: 1658: 1654: 1649: 1644: 1640: 1636: 1632: 1625: 1622: 1612: 1608: 1604: 1600: 1593: 1590: 1585: 1581: 1577: 1573: 1569: 1565: 1561: 1557: 1550: 1547: 1542: 1538: 1534: 1530: 1526: 1522: 1518: 1514: 1510: 1503: 1501: 1497: 1492: 1488: 1484: 1480: 1476: 1472: 1465: 1462: 1457: 1453: 1449: 1445: 1441: 1437: 1430: 1427: 1422: 1418: 1414: 1410: 1406: 1402: 1395: 1392: 1387: 1383: 1379: 1375: 1371: 1367: 1363: 1359: 1352: 1349: 1344: 1340: 1336: 1330: 1327: 1322: 1316: 1312: 1305: 1302: 1289: 1285: 1278: 1275: 1268: 1263: 1260: 1258: 1255: 1253: 1250: 1248: 1245: 1243: 1240: 1238: 1235: 1233: 1230: 1228: 1225: 1223: 1220: 1218: 1216: 1211: 1210: 1205: 1203: 1199: 1196: 1194: 1190: 1186: 1182: 1178: 1177:metanephrines 1169: 1166: 1164: 1160: 1156: 1152: 1151:embryogenesis 1148: 1144: 1135: 1133: 1131: 1127: 1126:Urine testing 1122: 1120: 1116: 1112: 1108: 1104: 1103:blood glucose 1100: 1096: 1092: 1084: 1082: 1080: 1075: 1073: 1069: 1065: 1061: 1057: 1053: 1048: 1046: 1042: 1038: 1033: 1031: 1027: 1023: 1019: 1015: 1010: 1008: 1004: 1003:intense light 1000: 996: 991: 989: 985: 981: 977: 973: 969: 961: 956: 954: 952: 948: 944: 940: 936: 932: 928: 924: 920: 916: 912: 910: 906: 904: 900: 898: 888: 886: 883: 881: 875: 871: 867: 859: 851: 827: 823: 819: 815: 811: 807: 806:phenylalanine 802: 800: 796: 792: 787: 782:-tyrosine to 777: 773: 764: 762: 760: 756: 755:area postrema 752: 750: 744: 740: 736: 732: 728: 724: 720: 716: 712: 708: 704: 700: 696: 688: 686: 674: 668: 663: 661: 655: 644: 640: 636: 632: 628: 616: 613: 605: 601: 589: 585: 577: 573: 569: 553: 536: 529: 522: 508: 499: 492: 485: 478: 471: 464: 450: 443: 436: 429: 422: 415: 413: 405: 403: 395: 393: 384: 375: 367: 365: 357: 349: 341: 331: 321: 309: 302: 298: 294: 287: 286: 279: 277: 275: 271: 267: 263: 255: 253: 251: 247: 242: 240: 233: 229: 228:hydroxylation 224: 222: 218: 214: 210: 206: 202: 198: 193: 191: 190:phenylalanine 187: 184: 179: 177: 173: 169: 167: 164: 160: 156: 152: 148: 144: 140: 134: 86: 85:catecholamine 79: 75: 67: 62: 58: 57: 53: 48: 44: 43: 40:(Adrenaline) 39: 34: 19: 3585: 3584: 3580: 3564: 3504: 3500: 3389:Solriamfetol 3361: 3306:Isoprenaline 3281:Halostachine 3268: 3264: 3228: 3220: 3192: 3184: 3176: 3168: 3153:Trace amines 3018:Trace amines 2995: 2892:Metanephrine 2731: 2643:Acetaldehyde 2312: 2304: 2276: 2268: 2246:Trace amines 1934:. Retrieved 1930: 1921: 1910:. Retrieved 1906: 1897: 1886:. Retrieved 1881: 1872: 1861:. Retrieved 1857: 1848: 1826:(2): 91–97. 1823: 1819: 1813: 1801:. Retrieved 1797: 1788: 1761: 1755: 1720: 1716: 1706: 1671: 1665: 1638: 1634: 1624: 1614:, retrieved 1602: 1592: 1559: 1555: 1549: 1516: 1512: 1508: 1474: 1470: 1464: 1439: 1435: 1429: 1404: 1400: 1394: 1361: 1357: 1351: 1343:the original 1338: 1329: 1311:Neuroscience 1310: 1304: 1292:. Retrieved 1287: 1277: 1214: 1200: 1197: 1189:metanephrine 1181:hypertension 1173: 1163:gibberellins 1140: 1123: 1088: 1076: 1049: 1034: 1011: 992: 965: 918: 913: 907: 896: 892: 879: 814:blood plasma 803: 790: 788: 768: 765:Biosynthesis 748: 731:neuromelanin 692: 684: 666: 664:(PNMT) with 659: 411: 401: 391: 363: 297:trace amines 292: 262:benzene ring 259: 243: 225: 194: 180: 170: 138: 84: 82: 3416:RTI-7470-44 3356:Phentermine 3249:Amphetamine 3195:-Octopamine 3187:-Octopamine 2879:Epinephrine 2769:Epinephrine 2648:Ammonia (NH 2519:Nucleosides 2279:-Octopamine 2271:-Octopamine 2183:T-HCA (GHC) 2140:Hypotaurine 2092:GABA system 2043:Glutathione 1477:: 211–218. 1364:: 342–350. 1294:October 26, 1185:tachycardia 1113:(a central 889:Degradation 870:epinephrine 793:-tyrosine ( 743:Epinephrine 673:-methionine 639:epinephrine 414:-Octopamine 348:Epinephrine 301:human brain 197:epinephrine 176:substituent 149:that has a 38:Epinephrine 3604:Categories 3384:Selegiline 3286:Higenamine 3276:Guanfacine 3215:Tryptamine 3210:Synephrine 3119:Classical 3112:Endogenous 2951:Catabolism 2936:Tryptophan 2915:Tryptophan 2779:Catabolism 2636:Candidates 2510:Nucleobase 2299:Tryptamine 2294:Synephrine 2205:Monoamines 2170:GHB system 2003:Amino acid 1936:2019-10-09 1912:2019-10-09 1888:2019-12-24 1863:2019-12-24 1616:2024-06-28 1603:StatPearls 1269:References 1119:tachypnoea 1095:heart rate 915:Catabolism 669:-adenosyl- 552:amino acid 421:Synephrine 183:amino acid 163:side-chain 3586:See also: 3379:RO5166017 3291:Hordenine 3231:-Tyramine 3223:-Tyramine 3146:Serotonin 3131:Histamine 2987:Melatonin 2983:Serotonin 2928:Anabolism 2919:Serotonin 2741:Anabolism 2527:Adenosine 2331:Histamine 2315:-Tyramine 2307:-Tyramine 2150:Sarcosine 2130:β-Alanine 2125:α-Alanine 1798:webmd.com 1766:Melbourne 1213:Catechol- 1143:alkaloids 1111:tolcapone 1079:porphyria 1022:brainstem 974:, act as 895:catechol- 846:aromatic 623:aromatic 588:cofactors 366:-Tyramine 330:-Tyrosine 264:with two 256:Structure 246:stimulant 157:with two 3493:Agonists 3456:Agonists 3126:Dopamine 3103:Agonists 2788:Dopamine 2761:Dopamine 2753:Tyrosine 2566:-derived 2512:-derived 2493:instead. 2448:Oleamide 2379:-derived 2360:instead. 2217:Dopamine 2028:Agmatine 2005:-derived 1840:41493767 1747:17660335 1657:12140786 1611:31082164 1584:12825309 1576:15317907 1491:24374199 1456:15860375 1421:19948186 1386:86229251 1206:See also 1159:ethylene 988:synapses 972:dopamine 962:Modality 957:Function 810:tyrosine 772:cofactor 737:produce 725:and the 711:Dopamine 701:and the 689:Location 645:, with O 570:enzyme ( 374:Dopamine 266:hydroxyl 244:Various 209:hormones 205:dopamine 186:tyrosine 172:Catechol 159:hydroxyl 151:catechol 78:Catechol 66:Dopamine 3086:ligands 2564:Vitamin 2458:RVD-Hpα 2413:AA-5-HT 2160:Taurine 2145:Proline 2135:Glycine 2078:Proline 2048:Glycine 1770:Cengage 1738:1994495 1698:8862875 1541:2578817 1533:3885079 1378:3473965 1232:Hormone 1085:Effects 1039:in the 1020:in the 978:in the 858:neurons 786:-DOPA. 717:in the 705:of the 697:of the 629:, with 612:ferrous 602:) with 515:pathway 457:pathway 455:primary 299:in the 215:of the 155:benzene 141:) is a 3527:  3472:  3460:  2529:system 2403:2-ALPI 2324:Others 2155:Serine 2083:Serine 1960:(MeSH) 1838:  1776:  1745:  1735:  1696:  1686:  1655:  1609:  1582:  1574:  1539:  1531:  1489:  1454:  1419:  1384:  1376:  1317:  1077:Acute 1070:, and 1018:nuclei 995:stress 610:, and 582:) and 576:oxygen 507:CYP2D6 3571:TAAR1 3485:TAAR5 3448:TAAR2 3346:3-MMA 3094:TAAR1 2438:NAGly 2377:Lipid 2212:6-OHM 2104:GABOB 1907:WebMD 1836:S2CID 1803:4 May 1580:S2CID 1537:S2CID 1382:S2CID 1028:. In 1005:, or 947:urine 909:MAOIs 513:minor 504:brain 340:-DOPA 274:amine 270:ethyl 239:-DOPA 166:amine 145:, an 3575:TAAR 3364:-PIT 3259:DOET 2491:here 2489:See 2433:NADA 2408:2-OG 2393:2-AG 2358:here 2356:See 2099:GABA 2073:NAAG 2058:GSSG 2053:GSNO 1805:2017 1774:ISBN 1743:PMID 1694:PMID 1684:ISBN 1653:PMID 1607:PMID 1572:PMID 1529:PMID 1487:PMID 1452:PMID 1417:PMID 1374:PMID 1315:ISBN 1296:2011 1191:and 1183:and 1115:COMT 970:and 937:and 808:and 795:AMPT 649:and 637:and 615:iron 521:COMT 498:AAAH 491:AAAH 484:PNMT 477:PNMT 470:PNMT 463:PNMT 449:AADC 442:AADC 435:AADC 295:and 3254:DOB 2546:ATP 2541:AMP 2536:ADP 2463:SEA 2453:PEA 2443:OEA 2428:LPI 2423:DEA 2178:GHB 2109:GHB 2068:NAA 1828:doi 1733:PMC 1725:doi 1676:doi 1643:doi 1564:doi 1521:doi 1479:doi 1475:724 1444:doi 1409:doi 1405:125 1366:doi 1362:493 927:FAD 776:PLP 606:, O 586:as 535:DBH 528:DBH 3606:: 2767:→ 2763:→ 2759:→ 2755:→ 2751:→ 2666:O) 2618:S) 1929:. 1905:. 1880:. 1856:. 1834:. 1824:14 1822:. 1796:. 1768:: 1741:. 1731:. 1721:60 1719:. 1715:. 1692:. 1682:. 1651:. 1637:. 1633:. 1601:, 1578:. 1570:. 1558:. 1535:. 1527:. 1517:53 1515:. 1499:^ 1485:. 1473:. 1450:. 1440:26 1438:. 1415:. 1403:. 1380:. 1372:. 1360:. 1337:. 1195:. 1165:." 1132:. 1101:, 1097:, 1066:, 1047:. 1009:. 1001:, 953:. 933:, 923:Mg 905:. 801:. 761:. 741:. 709:. 590:. 578:(O 223:. 168:. 139:CA 127:iː 115:oʊ 83:A 3505:N 3503:, 3501:N 3362:o 3269:N 3267:, 3265:N 3229:p 3221:m 3193:p 3185:m 3177:N 3169:N 3075:e 3068:t 3061:v 2996:N 2985:→ 2917:→ 2713:e 2706:t 2699:v 2675:) 2673:2 2664:2 2652:) 2650:3 2616:2 2313:p 2305:m 2277:p 2269:m 1987:e 1980:t 1973:v 1939:. 1915:. 1891:. 1866:. 1842:. 1830:: 1807:. 1782:. 1749:. 1727:: 1700:. 1678:: 1659:. 1645:: 1639:7 1586:. 1566:: 1560:3 1543:. 1523:: 1509:N 1493:. 1481:: 1458:. 1446:: 1423:. 1411:: 1388:. 1368:: 1323:. 1298:. 1215:O 919:O 897:O 880:N 862:L 854:L 848:L 842:L 838:L 834:L 830:L 791:p 784:L 780:L 749:N 671:L 667:S 660:N 652:L 647:2 625:L 619:L 608:2 596:L 592:L 580:2 564:L 560:L 555:L 412:p 402:N 392:N 364:p 338:L 328:L 318:L 237:L 153:( 133:/ 130:n 124:m 121:ə 118:l 112:k 109:ˈ 106:ə 103:t 100:æ 97:k 94:ˌ 91:/ 87:( 20:)

Index

Catecholamine synthesis

Epinephrine

Norepinephrine

Dopamine

Catechol
/ˌkætəˈkləmn/
monoamine neurotransmitter
organic compound
catechol
benzene
hydroxyl
side-chain
amine
Catechol
substituent
amino acid
tyrosine
phenylalanine
epinephrine
norepinephrine
dopamine
hormones
adrenal medulla
adrenal glands
fight-or-flight response
hydroxylation

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