O(6)-Methylguanine-DNA MethyltransferaseGuanineMethyltransferasesDNA Modification MethylasesCarmustineDacarbazineAntineoplastic Agents, AlkylatingDNA (Cytosine-5-)-MethyltransferaseDNA Mismatch RepairDNA MethylationDNA RepairDNA Repair EnzymesMethylnitronitrosoguanidineAlkylating AgentsPromoter Regions, GeneticBase Pair MismatchMutS Homolog 2 ProteinGlioblastomaMethylationGliomaDNA-Cytosine MethylasesBrain NeoplasmsMutS DNA Mismatch-Binding ProteinSite-Specific DNA-Methyltransferase (Adenine-Specific)Polymerase Chain ReactionTumor Cells, CulturedAzacitidineBase SequenceMolecular Sequence DataDNA-Binding ProteinsDNAAlkylationNucleic Acid HeteroduplexesMutationProtein MethyltransferasestRNA MethyltransferasesS-AdenosylmethionineHistone-Lysine N-MethyltransferaseCytosineAdaptor Proteins, Signal TransducingNuclear ProteinsDimethylnitrosamineEscherichia coliColorectal Neoplasms, Hereditary NonpolyposisCpG IslandsGene SilencingMethylnitrosoureaDNA DamageAmino Acid SequenceEpigenesis, GeneticProtein-Arginine N-MethyltransferasesHistonesMicrosatellite RepeatsAdenosine TriphosphatasesCell LineEscherichia coli ProteinsTranscription, GeneticSubstrate SpecificityProtein D-Aspartate-L-Isoaspartate MethyltransferaseProtein BindingMicrosatellite InstabilityDNA GlycosylasesImmunohistochemistryPlasmidsBinding SitesNeoplasm ProteinsCarrier ProteinsCell Line, TumorRNA, MessengerCloning, MolecularS-AdenosylhomocysteineN-Glycosyl HydrolasesNitrosaminesBacterial ProteinsDNA ReplicationDNA AdductsGene Expression RegulationKinetics5-MethylcytosineDNA, NeoplasmMutagenesisHeLa CellsAdenineDNA PrimersColorectal NeoplasmsSaccharomyces cerevisiaeTransfectionCytidineThymineFrameshift MutationGuanosineDNA, BacterialGene Expression Regulation, EnzymologicRepressor ProteinsCarcinogensChromatinRecombination, GeneticOligonucleotidesOligodeoxyribonucleotidesPhenotype