Phenylalanine ammonia lyase ({EC number|4.3.1.24}) is an enzyme that catalyzes a reaction converting L-phenylalanine to ammonia and trans-cinnamic acid. Phenylalanine ammonia lyase (PAL) is the first and committed step in the phenyl propanoid pathway and is therefore involved in the biosynthesis of the polyphenol compounds such as flavonoids, phen...
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http://en.wikipedia.org/wiki/Phenylalanine_ammonia-lyase
<enzyme> An enzyme that catalyses the deamination of l-phenylalanine to form trans-cinnamate and ammonia. It may also act on l-tyrosine. Since the enzyme deprives neoplastic tissue of phenylalanine, it has been used experimentally in the treatment of acute lymphoblastic leukaemia. The enzyme is obtained from many plants and is used as an enzy...
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http://www.encyclo.co.uk/local/20973
Enzyme involved in the synthesis of ligninand other phenolic compounds from phenylalanine. Used as an enzymic marker for lignification and other developmental processes in plant cells.
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Type: Term Definitions: 1. a nonmammalian enzyme that catalyzes the conversion of l-phenylalanine to trans-cinnamate and ammonia; it has been used in the treatment of phenylketonuria.
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