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phenylalanine-4-hydroxylase, monomeric form This model describes the smaller, monomeric form of phenylalanine-4-hydroxylase, as found in a small number of Gram-negative bacteria. The enzyme irreversibly converts phenylalanine to tryosine and is known to be the rate-limiting step in phenylalanine catabolism in some systems. This family is of biopterin and metal-dependent hydroxylases is related to a family of longer, multimeric aromatic amino acid hydroxylases that have additional N-terminal regulatory sequences. These include tyrosine 3-monooxygenase, phenylalanine-4-hydroxylase, and tryptophan 5-monoxygenase. [Energy metabolism, Amino acids and amines]
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Jiyao W et al.(2023). "The conserved domain database in 2023.",