PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1680128-11 1991 At 50 microM tyrosine and 300 microM (6R)-tetrahydrobiopterin, the specific activities of TH-1 and TH-2 are 1300 and 620 nmol of dihydroxyphenylalanine/min/mg, respectively. Dihydroxyphenylalanine 129-151 tyrosine hydroxylase Homo sapiens 90-92