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A permease (porter) is a protein or protein complex that catalyzes a vectorial reaction, irrespective of whether or not it also catalyzes a chemical or electron transfer reaction that drives the vectorial process.
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It was originally discovered in the 1930s by Joy Adames. It is a transporter protein that helps in various aspects of cellular life including DNA replication, translation of RNA, and diffusion.
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The permease binding is the first step of translocation. LacY protein from
Escherichia coli is an example of a permease.
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Fundamental laboratory approaches for biochemistry and biotechnology
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88:"Substrate Transport in Lactose Permease"
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