Ultraviolet RaysLightRadiation EffectsUltraviolet TherapyRadiation GeneticsMicroscopy, UltravioletPUVA TherapyDose-Response Relationship, RadiationSpectrophotometry, UltravioletMethoxsalenDNA RepairSunscreening AgentsErythemaPyrimidine DimersSunlightPhotochemistryThyminePhotosensitivity DisordersXeroderma PigmentosumSkinPsoralensPhotolysisSunburnDNA DamageMutationSkin NeoplasmsDNAMice, HairlessEye Protective DevicesEscherichia coliGenetics, MicrobialNeoplasms, Radiation-InducedSkin AgingTrioxsalenFicusinMethyl MethanesulfonateDNA, BacterialKeratinocytesMitomycinsDNA ReplicationLysogenyCell LineCondimentsFibroblastsCell SurvivalThymidineAffinity LabelsTritiumKineticsDarknessPhotosensitizing AgentsCentrifugation, Density GradientFluorescenceCells, CulturedTime FactorsColiphagesWettabilityMutagensDermatitis, ContactEpidermisBacteriophagesProkaryotic Initiation Factor-1AcridinesMolecular Sequence DataSkin PigmentationCobalt RadioisotopesX-RaysParabiosisDeoxyribonucleasesEndonucleasesCockayne SyndromeDeoxyribodipyrimidine Photo-LyaseHydroxyureaRecombination, GeneticAzidesBase SequenceGamma RaysLasersAlkylating AgentsGenesAgarBacillus megateriumLangerhans CellsPityriasisHot TemperatureCaffeineMyosin Light ChainsCulture MediaDwarfismXeroderma Pigmentosum Group A ProteinAir MicrobiologyMice, Inbred C3HMolecular WeightRadiation ToleranceNucleic Acid DenaturationCricetinaeChromatography, High Pressure LiquidLens, CrystallineMethodsTemperature