PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8162597-13 1994 These results indicate that MNU and ENU induce different mutational spectra in vivo and that DNA repair systems remove O6-methylguanine, O2, and/or O4-ethylthymidine much faster from the transcribed strand than the nontranscribed strand of the hprt gene in these rat fibroblasts. O-(6)-methylguanine 119-135 hypoxanthine phosphoribosyltransferase 1 Rattus norvegicus 244-248