PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21493591-3 2011 Although DNA mismatch repair and O(6)-methylguanine (O(6)MeG)-DNA methyltransferase (MGMT) are key determinants of cellular resistance to these drugs, there is no correlation between these markers and the therapeutic response in melanoma, indicating as yet unknown mechanisms of drug resistance. O-(6)-methylguanine 33-51 O-6-methylguanine-DNA methyltransferase Mus musculus 85-89