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Jouko Halme has written:
'Studies on protocollagen proline hydroxylase' -- subject(s): Collagen, Proline hydroxylase
Phenylalanine hydroxylase breaks down phenylalanine.
phenylketonuria
In humans, the gene that codes for the enzyme phenylalanine hydroxylase is an expmple of a recessive gene
They could not produce tyrosine slowly