Phenylketonuria (fee-null-keet-o-noo-ria), mercifully also known as “PKU” (pee – kay – you) is a disorder in which phenylalanine, an essential amino acid, is not broken down as it normally would be by an enzyme (phenylalanine hydroxylase) and thus accumulates (in the form of phenylpyruvic acid) in the body. Normally, Phenylalanine hydroxylase coverts phenylalanine into tyrosine, [...]
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