PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12521305-0 2002 Mutations induced by 1,3-butadiene metabolites, butadiene diolepoxide, and 1,2,3,4-diepoxybutane at the Hprt locus in CHO-K1 cells. 1,3-butadiene 21-34 hypoxanthine-guanine phosphoribosyltransferase Cricetulus griseus 104-108