Specific excision of methylation products from DNA of Escherichia coli treated with N-methyl-N'-nitro-N-nitrosoguanidine.

Adenine/metabolism Carcinogens/metabolism Chromatography, Paper DNA, Bacterial/metabolism Drug Resistance, Microbial Escherichia coli/metabolism Genetics, Microbial Guanidines/metabolism Guanine/metabolism Methylation Mutation Nitro Compounds/metabolism Nitroso Compounds/metabolism Nitrosoguanidines/metabolism Tritium

Carcinogens DNA, Bacterial Guanidines Nitro Compounds Nitroso Compounds Nitrosoguanidines Tritium Guanine Adenine