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isoleucine
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isoleucine

chemical compound
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amino acid
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isoleucine, an amino acid present in most common proteins, sometimes comprising 2 to 10 percent by weight. First isolated in 1904 from fibrin, a protein involved in blood-clot formation, isoleucine is one of several so-called essential amino acids for chicks, rats, and other higher animals, including man; i.e., they cannot synthesize it and require dietary sources. In microorganisms and plants, isoleucine is synthesized from the amino acid threonine. The chemical structure of isoleucine isisoleucine, chemical compound

This article was most recently revised and updated by Erik Gregersen.