PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 28691-9 1978 Based on these observations, the metabolic block induced by 5-COOH-2"-dUrd has been localized to the de novo pyrimidine biosynthetic pathway between orotate phosphoribosyl transferase and orotidine 5"-phosphate decarboxylase. 5-cooh-2"-durd 60-74 uridine monophosphate synthetase Homo sapiens 188-224