PyrimidinesPyrimidine NucleotidesPyrimidine DimersPyrimidine NucleosidesFatty Acids, UnsaturatedMolecular StructureCarbon-Carbon Double Bond IsomerasesStereoisomerismDeoxyribonuclease (Pyrimidine Dimer)Pyrimidine PhosphorylasesIsomerismAlkenesUltraviolet RaysOrotic AcidFatty Acid DesaturasesStructure-Activity RelationshipOxidoreductases Acting on CH-CH Group DonorsOrotate PhosphoribosyltransferaseUracilMagnetic Resonance SpectroscopyMolecular ConformationMolecular Sequence DataPurinesKineticsModels, MolecularSubstrate SpecificityDeoxyribodipyrimidine Photo-LyaseDihydroorotaseUridineHydrogen BondingPurine NucleotidesAspartate CarbamoyltransferaseOxidation-ReductionCalendulaModels, ChemicalHydrogenationOrotidine-5'-Phosphate DecarboxylaseCarbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)Uridine PhosphorylaseChromatography, High Pressure LiquidCytidineHydrocarbons, CyclicDisulfidesMass SpectrometryBase SequenceEscherichia coliCholestanesCatalysisDihydroorotate OxidaseFatty AcidsMutationDNAGas Chromatography-Mass SpectrometryOxidoreductasesUracil NucleotidesDNA RepairAmino Acid SequenceThyminePhotochemistryUridine KinaseChromatography, GasPentosyltransferasesNucleosidesChromatography, Thin LayerCyclizationUridine MonophosphateCrystallography, X-RayEstersBinding SitesPurine NucleosidesTrichosanthesUridine TriphosphateChemistryDeoxyribonucleosidesChemical PhenomenaPhosphatidylcholinesThermodynamicsProtein ConformationNucleic Acid ConformationSterolsDeoxyuridineCholestadienolsDodecenoyl-CoA IsomeraseEpoxy CompoundsSpectrophotometry, UltravioletMycolic AcidsCarbonTemperatureDesmosterolDental BondingSpectrometry, Mass, Electrospray IonizationAcyl Coenzyme AIsomerasesRetinaldehydeSpectrophotometry, InfraredPurine-Pyrimidine Metabolism, Inborn ErrorsCarotenoidsNucleotidesChemistry, PhysicalPhysicochemical Phenomena