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Protoporphyrin |
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protoporphyrin /pro·to·por·phy·rin/ (-por´fi-rin) any of several porphyrin isomers, one of which is an intermediate in heme biosynthesis; it is accumulated and excreted excessively in feces in erythropoietic protoporphyria and variegate porphyria.
Protoporphyrin A precursor molecule to the porphyrin molecule. Mentioned in: Porphyrias protoporphyrin a porphyrin whose iron complex united with protein occurs in hemoglobin, myoglobin and certain respiratory pigments. protoporphyrin III combines with 4 moles of iron to form the heme moiety of hemoglobin. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Protoporphyrin
