Alkylating AgentsAntineoplastic Agents, AlkylatingNylonsAlkylationMethylnitronitrosoguanidineAcronineMethyl MethanesulfonateEthyl MethanesulfonateDacarbazineDNA DamagePyrrolesPoly(ADP-ribose) PolymerasesDNA RepairDNAO(6)-Methylguanine-DNA MethyltransferaseCell Line, TumorMechlorethamineChlorambucilCarmustineNitrogen Mustard CompoundsMelphalanGuanineMethylnitrosoureaCyclophosphamideNitrosourea CompoundsTriaziquoneSulfuric Acid EstersMutagensThiotepaEthylnitrosoureaAziridinesMethyltransferasesMustard GasDrug ResistanceAntineoplastic AgentsMitomycinsCell SurvivalDNA Modification MethylasesEthylmaleimideMitomycinPropiolactoneEtanidazoleDNA GlycosylasesDNA Repair EnzymesMesylatesDNA AdductsQuinacrine Mustard