PorphyrinsHemeHeme Oxygenase (Decyclizing)CoproporphyrinsMetalloporphyrinsHeme Oxygenase-1ProtoporphyrinsPorphyriasHematoporphyrinsUroporphyrinsAminolevulinic AcidHemeproteinsDeuteroporphyrinsFerrochelataseMesoporphyrinsHarderian GlandLevulinic AcidsHematoporphyrin DerivativePhotosensitizing AgentsPhotochemotherapySpectrophotometryCarbon MonoxideIronMyoglobinPorphyrinogensPorphobilinogenDihematoporphyrin EtherHydroxymethylbilane SynthaseUroporphyrinogen DecarboxylaseSpectrum Analysis, RamanOxidation-ReductionPorphobilinogen SynthaseCytochrome c GroupHeminProtoporphyrinogen OxidaseSpectrometry, FluorescenceHexachlorobenzeneHemoglobinsHeptanoates5-Aminolevulinate SynthetaseUroporphyrinogensPeroxidasesMolecular StructurePorphyrias, HepaticCobaltKineticsWhalesTetrapyrrolesElectron Spin Resonance SpectroscopyPorphyria Cutanea TardaHemopexinElectronsLyasesOxygenCytochromesSpectrophotometry, UltravioletHorseradish PeroxidaseDicarbethoxydihydrocollidineCytochrome-c PeroxidaseFerric CompoundsBinding SitesCoproporphyrinogen OxidaseMetmyoglobinPhotochemistryFerrous CompoundsModels, ChemicalChromatography, High Pressure LiquidCytochrome P-450 Enzyme SystemHematoporphyrin PhotoradiationHydrogen-Ion ConcentrationCircular DichroismElectron Transport Complex IVLigandsHorsesProtein BindingGriseofulvinManganeseGold CompoundsElectrochemistryPorphyria, ErythropoieticUroporphyrinogen III SynthetaseMagnetic Resonance SpectroscopyCatalysisHistidineLightProtein Conformation