Protoporphyrins are tetrapyrroles containing the following side chains: Protoporphyrin IX is a biochemically widely used carrier molecule for divalent cations. Together with iron (Fe 2+) the body of the heme- group of hemoglobin, myoglobin and many other heme-containing enzymes like cytochrome c and catalase are formed. Complexed with magnesium-io...
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http://en.wikipedia.org/wiki/Protoporphyrin
<biochemistry> Porphyrin ring structure lacking metal ions. The most abundant is protoporphyrin IX, the immediate precursor of hem. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
(pro″to-por´fә-rin) a porphyrin whose iron complex united with protein occurs in hemoglobin, myoglobin, and certain respiratory pigments. It is accumulated and excreted excessively in the feces in erythropoietic protoporphyria and variegate porphyria.
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http://www.encyclo.co.uk/local/21001
Porphyrin ring structure lacking metal ions. The most abundant is protoporphyrin IX, the immediate precursor of haem.
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http://www.encyclo.co.uk/visitor-contributions.php
is a pigment that produces colors ranging from yellow and pink to reddish buffs or browns. It is one of three pigments secreted by cells in the oviduct (see biliverdin).
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http://www.sialis.org/glossary.htm
No exact match found.
