O(6)-Methylguanine-DNA MethyltransferaseGuanineMethyltransferasesDNA Modification MethylasesCarmustineDacarbazineAntineoplastic Agents, AlkylatingDNA (Cytosine-5-)-MethyltransferaseDNA Mismatch RepairDNA MethylationDNA RepairDNA Repair EnzymesMethylnitronitrosoguanidineAlkylating AgentsBase Pair MismatchPolymerase Chain ReactionPromoter Regions, GeneticMutS Homolog 2 ProteinGlioblastomaMethylationGliomaDNA-Cytosine MethylasesBrain NeoplasmsMutS DNA Mismatch-Binding ProteinSite-Specific DNA-Methyltransferase (Adenine-Specific)Tumor Cells, CulturedAzacitidineMolecular Sequence DataBase SequenceDNAAlkylationNucleic Acid HeteroduplexesProtein MethyltransferasesDNA-Binding ProteinsMutationtRNA MethyltransferasesS-AdenosylmethionineHistone-Lysine N-MethyltransferaseCytosineEscherichia coliDimethylnitrosamineAdaptor Proteins, Signal TransducingColorectal Neoplasms, Hereditary NonpolyposisDNA-Directed DNA PolymeraseDNA DamageMethylnitrosoureaNuclear ProteinsCpG IslandsAmino Acid SequenceGene SilencingEpigenesis, GeneticProtein-Arginine N-MethyltransferasesAdenosine TriphosphatasesMicrosatellite RepeatsRNA Polymerase IISubstrate SpecificityDNA ReplicationHistonesEscherichia coli ProteinsProtein D-Aspartate-L-Isoaspartate MethyltransferaseDNA GlycosylasesTranscription, GeneticImmunohistochemistryMicrosatellite InstabilityKineticsCell LineNeoplasm ProteinsDNA AdductsN-Glycosyl HydrolasesS-AdenosylhomocysteineNitrosaminesCarrier ProteinsProtein BindingDNA Polymerase I5-MethylcytosineSaccharomyces cerevisiaeDNA, NeoplasmAdenineMutagenesisDNA Polymerase IIICell Line, TumorFrameshift MutationDNA PrimersColorectal NeoplasmsThymineRNA, MessengerGuanosineBacterial ProteinsDNA, BacterialCytidineCloning, MolecularDNA Polymerase IIPlasmidsHeLa CellsOligonucleotidesRecombination, GeneticBinding SitesCarcinogensReverse Transcriptase Polymerase Chain ReactionNitrosourea Compounds