Studies on phenylalanine and tyrosine hydroxylation by rat brain tyrosine hydroxylase.

Abstract

Tyrosine hydroxylase (EC1.14.16.2), presumably the rate-limiting enzyme in the biosynthesis of catecholamines, is known to catalyze the hydroxylation of both phenylalanine and tyrosine. Using both an isolated enzyme preparation and a synaptosomal preparation, where some architectural integrity of the tissue has been preserved, we have attempted to evaluate… (More)

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