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, CulturedAzacitidineAlkylationProtein MethyltransferasesNucleic Acid HeteroduplexesS-AdenosylmethionineMolecular Sequence DataDNAtRNA MethyltransferasesBase SequenceDNA-Binding ProteinsHistone-Lysine N-MethyltransferaseCytosineMutationDimethylnitrosamineAdaptor Proteins, Signal TransducingColorectal Neoplasms, Hereditary NonpolyposisMethylnitrosoureaEscherichia coliDNA DamageCpG IslandsNuclear ProteinsGene SilencingEpigenesis, GeneticProtein-Arginine N-MethyltransferasesMicrosatellite RepeatsAdenosine TriphosphatasesAmino Acid SequenceSubstrate SpecificityProtein D-Aspartate-L-Isoaspartate MethyltransferaseHistonesDNA GlycosylasesEscherichia coli ProteinsMicrosatellite InstabilityS-AdenosylhomocysteineImmunohistochemistryN-Glycosyl HydrolasesNitrosaminesNeoplasm ProteinsDNA Adducts5-MethylcytosineDNA ReplicationCarrier ProteinsKineticsCell LineAdenineDNA, NeoplasmColorectal NeoplasmsCell Line, TumorGuanosineCytidineThymineFrameshift MutationProtein BindingMutagenesisMethyl MethanesulfonateSaccharomyces cerevisiaeBacterial ProteinsCarcinogensNitrosourea CompoundsMutagensRecombination, GeneticGerm-Line MutationEnzyme InhibitorsPlasmidsOligonucleotidesMonomethylhydrazineCloning, MolecularDNA, BacterialPhenotypeHeLa CellsRNA, MessengerDNA PrimersTranscription, GeneticDeoxyribonucleases, Type II Site-Specific