Phenylalanine hydroxylase (PheOH, alternatively PheH or PAH) ({EC number|1.14.16.1}) is an enzyme that catalyzes the hydroxylation of the aromatic side-chain of phenylalanine to generate tyrosine. PheOH is one of three members of the pterin-dependent amino acid hydroxylases, a class of monooxygenase that uses tetrahydrobiopterin (BH4, a pteridine ...
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http://en.wikipedia.org/wiki/Phenylalanine_hydroxylase
(from the article `phenylketonuria`) ...of the body to metabolize the amino acid phenylalanine. Phenylalanine is normally converted in the human body to tyrosine, another amino acid, by ... ...disorders classified as inborn errors of metabolism. One of the best-known examples of this class of disorders is phenylketonuria (PKU), which .....
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http://www.britannica.com/eb/a-z/p/55
<enzyme> An enzyme of the oxidoreductase class that catalyses the reaction l-phenylalanine, tetrahydrobiopterin, and oxygen to yield l-tyrosine, dihydrobiopterin, and water, the reaction synthesizing tyrosine from phenylalanine. ... Chemical name: L-Phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase (4-hydroxylating) ... Registry number:...
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http://www.encyclo.co.uk/local/20973
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