PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 14500751-10 2003 Tetrahydrobiopterin-derived radical species formed by reaction with reactive nitrogen species may account for inhibition of TH via mechanisms that do not involve tyrosine nitration. radical 28-35 tyrosine hydroxylase Homo sapiens 124-126