Thymine NucleotidesMegaloblastsThymineAnemia, MegaloblasticLeukemia, LymphoidMethotrexateNucleotidesThymine DNA GlycosylaseMolecular Sequence DataUracilPolymorphism, Single NucleotideBase SequenceDNAAdenine NucleotidesPyrimidine DimersVisual FieldsAmino Acid SequenceDeoxyribonuclease (Pyrimidine Dimer)Guanine NucleotidesElectromagnetic FieldsBromouracilNucleic Acid ConformationEscherichia coliPentoxylPurine NucleotidesCytosineOsmium TetroxideCloning, MolecularMutationDNA RepairDNA, BacterialPyrimidine NucleotidesEndodeoxyribonucleasesSequence Analysis, DNAKineticsThymidineUltraviolet RaysOligodeoxyribonucleotidesAdenineGuanineMagnetic FieldsNucleotides, CyclicGuanine Nucleotide Exchange FactorsPotassium PermanganateSequence Homology, Nucleic AcidOligonucleotidesBinding SitesBase Pairing