PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1933853-0 1991 Nitrosamine-induced cancer: selective repair and conformational differences between O6-methylguanine residues in different positions in and around codon 12 of rat H-ras. O-(6)-methylguanine 84-100 HRas proto-oncogene, GTPase Rattus norvegicus 163-168 1807448-0 1991 Positional effects on the structure and stability of abbreviated H-ras DNA sequences containing O6-methylguanine residues at codon 12. O-(6)-methylguanine 96-112 HRas proto-oncogene, GTPase Rattus norvegicus 65-70 1807448-1 1991 Activation of the H-ras protooncogene in rats by methylating carcinogens results from a G-to-A transition mutation at the second position of codon 12 (GGA), presumably due to formation of an O6-methylguanine (m6G) at this position. O-(6)-methylguanine 191-207 HRas proto-oncogene, GTPase Rattus norvegicus 18-23 10767621-9 2000 O(6)-methylguanines are repaired at a similar slow rate in both transcriptionally active (H-ras, beta-actin) and inactive genes (IgE heavy chain; bulk DNA) of the target mammary epithelia (which express the repair protein O(6)-alkylguanine-DNA alkyltransferase (AGT) at a very low level). O-(6)-methylguanine 1-19 HRas proto-oncogene, GTPase Rattus norvegicus 90-95 9465068-4 1998 In mammary epithelia (very low expression of O6-alkylguanine-DNA alkyltransferase, MGMT), O6-methylguanine (O6-MeGua) was eliminated from transcribed (H-ras and beta-actin) and inactive genes (IgE heavy chain) at the same slow rate as determined for bulk genomic DNA. O-(6)-methylguanine 90-106 HRas proto-oncogene, GTPase Rattus norvegicus 151-156 9465068-4 1998 In mammary epithelia (very low expression of O6-alkylguanine-DNA alkyltransferase, MGMT), O6-methylguanine (O6-MeGua) was eliminated from transcribed (H-ras and beta-actin) and inactive genes (IgE heavy chain) at the same slow rate as determined for bulk genomic DNA. O-(6)-methylguanine 108-116 HRas proto-oncogene, GTPase Rattus norvegicus 151-156 9465068-5 1998 The persistence of O6-MeGua in DNA correlated with a high frequency of G:C --> A:T transition mutations at codon 12 of the H-ras gene in MeNU-induced tumors. O-(6)-methylguanine 19-27 HRas proto-oncogene, GTPase Rattus norvegicus 126-131 7688078-0 1993 Nonrandom distribution of O6-methylguanine in H-ras gene sequence from DNA modified with N-methyl-N-nitrosourea. O-(6)-methylguanine 26-42 HRas proto-oncogene, GTPase Rattus norvegicus 46-51 7688078-1 1993 The distribution of O6-meG in the rat H-ras gene sequence was studied using PCR by transition of O6-meG to adenine during the reaction. O-(6)-methylguanine 20-26 HRas proto-oncogene, GTPase Rattus norvegicus 38-43 1933853-5 1991 We have measured accurate rates of repair by the E. coli and gene O6-alkylguanine-DNA-alkyltransferase of an O6-methylguanine in various positions in chemically synthesized 15-base pair DNA duplexes having the H-ras sequence. O-(6)-methylguanine 109-125 HRas proto-oncogene, GTPase Rattus norvegicus 210-215 2643488-0 1989 Excision repair of O6-methylguanine synthesized at the rat H-ras N-methyl-N-nitrosourea activation site and introduced into Escherichia coli. O-(6)-methylguanine 19-35 HRas proto-oncogene, GTPase Rattus norvegicus 59-64 2643488-1 1989 O6-methylguanine (O6-methylG) is believed to be the premutagenic lesion responsible for mutational activation of the H-ras proto-oncogene in rats treated with N-methyl-N-nitrosourea (MNU). O-(6)-methylguanine 0-16 HRas proto-oncogene, GTPase Rattus norvegicus 117-122 2643488-1 1989 O6-methylguanine (O6-methylG) is believed to be the premutagenic lesion responsible for mutational activation of the H-ras proto-oncogene in rats treated with N-methyl-N-nitrosourea (MNU). O-(6)-methylguanine 18-28 HRas proto-oncogene, GTPase Rattus norvegicus 117-122