PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15135645-5 2004 All the 4-hydroxylated catechols induced significantly more colony formations in V79 cells as compared to the parent phenols at 100nM, suggesting that the catechol estrogen metabolites are more mutagenic towards the hprt gene than estrogens. catechol 23-31 hypoxanthine-guanine phosphoribosyltransferase Cricetulus griseus 216-220