title: In vivo determination of phenylalanine hydroxylase activity using heptadeutero-phenylalanine and comparison to the in vitro assay values.
mesh_terms: D003903:Deuterium; D003937:Diagnosis, Differential; D006801:Humans; D008722:Methods; D010649:Phenylalanine / Q000097:blood* / Q000378:metabolism; D010651:Phenylalanine Hydroxylase / Q000378:metabolism*; D010661:Phenylketonurias / Q000175:diagnosis*
chemical_list: D010649:Phenylalanine; D003903:Deuterium; D010651:Phenylalanine Hydroxylase