O(6)-Methylguanine-DNA MethyltransferaseGuanineMethyltransferasesDNA Modification MethylasesCarmustineDacarbazineAntineoplastic Agents, AlkylatingDNA (Cytosine-5-)-MethyltransferaseDNA Mismatch RepairDNA MethylationDNA RepairDNA Repair EnzymesMethylnitronitrosoguanidineAlkylating AgentsBase Pair MismatchMutS Homolog 2 ProteinGlioblastomaPromoter Regions, GeneticMethylationGliomaDNA-Cytosine MethylasesBrain NeoplasmsMutS DNA Mismatch-Binding ProteinSite-Specific DNA-Methyltransferase (Adenine-Specific)Polymerase Chain ReactionTumor Cells, CulturedAzacitidineAlkylationNucleic Acid HeteroduplexesProtein MethyltransferasesDNAMolecular Sequence DatatRNA MethyltransferasesS-AdenosylmethionineBase SequenceDNA-Binding ProteinsHistone-Lysine N-MethyltransferaseCytosineMutationDimethylnitrosamineAdaptor Proteins, Signal TransducingColorectal Neoplasms, Hereditary NonpolyposisMethylnitrosoureaDNA DamageCpG IslandsEscherichia coliNuclear ProteinsGene SilencingEpigenesis, GeneticProtein-Arginine N-MethyltransferasesMicrosatellite RepeatsAdenosine TriphosphatasesAmino Acid SequenceSubstrate SpecificityProtein D-Aspartate-L-Isoaspartate MethyltransferaseHistonesDNA GlycosylasesMicrosatellite InstabilityEscherichia coli ProteinsImmunohistochemistryS-AdenosylhomocysteineN-Glycosyl HydrolasesNitrosaminesNeoplasm ProteinsDNA AdductsDNA Replication5-MethylcytosineCarrier ProteinsAdenineCell LineColorectal NeoplasmsDNA, NeoplasmKineticsCell Line, TumorCytidineGuanosineFrameshift MutationThymineMutagenesisProtein BindingSaccharomyces cerevisiaeCarcinogensBacterial ProteinsNitrosourea CompoundsGerm-Line MutationRecombination, GeneticMutagensPlasmidsOligonucleotidesMonomethylhydrazineHeLa CellsDNA, BacterialCloning, MolecularPhenotypeDeoxyribonucleases, Type II Site-SpecificDNA PrimersTranscription, GeneticRNA, MessengerEndodeoxyribonucleasesEnzyme Inhibitors