PorphyrinsCytochrome P-450 Enzyme SystemCytochrome c GroupCytochromesCytochrome b GroupCytochromes cCoproporphyrinsCytochromes b5MetalloporphyrinsElectron Transport Complex IVHemeCytochromes c1HematoporphyrinsPorphyriasUroporphyrinsCytochromes fCytochrome P-450 CYP3AProtoporphyrinsCytochromes bSpectrophotometryCytochrome P-450 CYP2E1Oxidation-ReductionAminolevulinic AcidCytochrome b6f ComplexCytochromes c2Cytochrome P-450 CYP1A2DeuteroporphyrinsCytochrome ReductasesCytochrome P-450 CYP1A1Electron TransportMicrosomes, LiverMesoporphyrinsCytochrome P-450 CYP2B1NADPH-Ferrihemoprotein ReductaseCytochrome P-450 CYP2D6FerrochelataseHarderian GlandHematoporphyrin DerivativeMitochondriaPhotosensitizing AgentsPhotochemotherapyKineticsLevulinic AcidsCytochromes a1Cytochrome d GroupCytochrome-c PeroxidaseMixed Function OxygenasesAryl Hydrocarbon HydroxylasesHemeproteinsOxidoreductasesSpectrum AnalysisPorphyrinogensDihematoporphyrin EtherPorphobilinogenCarbon MonoxidePhenobarbitalHorsesCytochromes aCytochromes c6HydroxylationUroporphyrinogen DecarboxylaseCytochromes c'Hemin5-Aminolevulinate SynthetaseElectronsElectron Spin Resonance SpectroscopyMolecular Sequence DataOxygenAmino Acid SequenceSpectrometry, FluorescenceIronHexachlorobenzeneLiverMolecular StructureModels, MolecularEnzyme InductionSpectrophotometry, UltravioletHydroxymethylbilane SynthaseChromatography, High Pressure LiquidSpectrum Analysis, RamanCyanidesCattlePotentiometryDicarbethoxydihydrocollidineCytochrome-B(5) ReductaseOxidoreductases, N-DemethylatingSteroid HydroxylasesBenzoflavonesProtein ConformationBinding SitesMicrosomesParacoccus denitrificansHydrogen-Ion ConcentrationUroporphyrinogensL-Lactate Dehydrogenase (Cytochrome)PeroxidasesCatalysisCaspasesApoptosisBiotransformation