O(6)-Methylguanine-DNA MethyltransferaseGuanineMethyltransferasesDNA Modification MethylasesCarmustineDacarbazineAntineoplastic Agents, AlkylatingDNA (Cytosine-5-)-MethyltransferaseDNA Mismatch RepairDNA MethylationDNA RepairDNA Repair EnzymesMutS DNA Mismatch-Binding ProteinMethylnitronitrosoguanidineAlkylating AgentsBase Pair MismatchMutS Homolog 2 ProteinGlioblastomaPromoter Regions, GeneticMethylationGliomaDNA-Cytosine MethylasesBrain NeoplasmsSite-Specific DNA-Methyltransferase (Adenine-Specific)Polymerase Chain ReactionTumor Cells, CulturedAzacitidineNucleic Acid HeteroduplexesAlkylationMolecular Sequence DataDNAProtein MethyltransferasesDNA-Binding ProteinsBase SequencetRNA MethyltransferasesS-AdenosylmethionineMutationHistone-Lysine N-MethyltransferaseCytosineDimethylnitrosamineAdaptor Proteins, Signal TransducingColorectal Neoplasms, Hereditary NonpolyposisEscherichia coliMethylnitrosoureaAdenosine TriphosphatasesDNA DamageCpG IslandsNuclear ProteinsGene SilencingEscherichia coli ProteinsEpigenesis, GeneticProtein-Arginine N-MethyltransferasesMicrosatellite RepeatsAmino Acid SequenceSubstrate SpecificityProtein D-Aspartate-L-Isoaspartate MethyltransferaseDNA GlycosylasesHistonesMicrosatellite InstabilityImmunohistochemistryN-Glycosyl HydrolasesS-AdenosylhomocysteineNeoplasm ProteinsNitrosaminesDNA AdductsDNA ReplicationCarrier Proteins5-MethylcytosineAdenineCell LineBacterial ProteinsKineticsColorectal NeoplasmsDNA, NeoplasmFrameshift MutationThymineGuanosineCell Line, TumorProtein BindingCytidineMutagenesisSaccharomyces cerevisiaeRecombination, GeneticCarcinogensNitrosourea CompoundsDNA, BacterialEndodeoxyribonucleasesOligonucleotidesMutagensPlasmidsGerm-Line MutationPhenotypeCloning, MolecularDNA PrimersMonomethylhydrazineHeLa CellsTranscription, GeneticRNA, MessengerDeoxyribonucleases, Type II Site-SpecificSaccharomyces cerevisiae Proteins