protoporphyrin

(redirected from protoporphyrin III)
Also found in: Medical.

pro·to·por·phy·rin

 (prō′tō-pôr′fə-rĭn)
n.
A metal-free porphyrin, C34H34N4O4, that combines with ferrous iron to form the heme group in hemoglobin and myoglobin, and with ferric iron to form the hemin group in catalase and some cytochromes.

protoporphyrin

(ˌprəʊtəʊˈpɔːfɪrɪn)
n
(Biochemistry) a type of porphyrin that, when combined with an iron atom, forms haem, the oxygen-bearing prosthetic group of the red blood pigment haemoglobin
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References in periodicals archive ?
Studies of protoporphyrin III. Photoelectric and fluorophotometric methods for the quantitative determination of the protoporphyrin in blood.