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A sensitive and simple method for separation of eight unconjugated pterins has been devel oped and used to analyze banana, seeds… Expand Tetrahydrobiopterin (BH4) deWciency among newborns with hyperphenylalaninemia must be rapidly diagnosed and distinguished from… Expand diagnosis was confirmed by the same findings in fetal skin fibroblasts after termination of the pregnancy. Bile acids were… Expand A new form of atypical phenylketonuria (PKU) was discovered in 1988. Characteristic for this transient hyperphenylalaninemia is… Expand Previously we described a new form of human hyperphenylalaninemia characterized by the formation of 7-substituted pterins. We… Expand Three novel pteridines have been isolated from the urine of patients with a new variant of 6-(L-erythro-1',2'-dihydroxypropyl)-5… Expand Tetrahydrobiopterin (BH4) deficiency comprises a group of very rare diseases characterized by progressive neurological symptoms… Expand Rat liver xanthine dehydrogenase exists as NAD-dependent type(type-D) in the freshly prepared sample but through the procedure of… Expand The tautomeric structure of the cofactor product of aromatic amino acid hydroxylases, quinoid dihydrobiopterin, is still unknown… Expand