tetrahydrobiopterin sapropterin phenylketonuria drug molecule. cofactor to a number of aromatic amino acid hydroxylase enzymes..

tetrahydrobiopterin sapropterin phenylketonuria drug molecule cofactor number aromatic amino acid hydroxylase enzymes biopterin bh4 thb phenylalanine nitric oxide hyperphenylalaninemia hydrogen carbon oxygen nitrogen disease therapy medicine medicinal product pharmacology pharmacy pharmaceutical pharma treatment generic atoms chemical chemistry composition atomic model molecular are represented as spheres conventional color coding white grey red blue