coproporphyrin

coproporphyrin /cop·ro·por·phy·rin/ (-por´fĭ-rin) a porphyrin occurring as several isomers; the III isomer, an intermediate in heme biosynthesis, is excreted in the feces and urine in hereditary coproporphyria and variegate porphyria; the I isomer, a side product, is excreted in the feces and urine in congenital erythropoietic porphyria.

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cop·ro·por·phy·rin (kpr-pôrf-rn)

n.

Either of two porphyrin compounds found normally in feces as a decomposition product of bilirubin.

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coproporphyrin

[kop′rōpôr′firin]

Etymology: Gk, kopros + porphyros, purple

1 any of the nitrogenous organic substances normally excreted in the feces that are products of the breakdown of bilirubin from hemoglobin decomposition.

2 a test used to measure red blood cell porphyrin levels.

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coproporphyrin [kop″ro-por´fĭ-rin]

a porphyrin occurring as several isomers; the III isomer, an intermediate in heme biosynthesis, is excreted in the feces and urine in hereditary coproporphyria and variegate porphyria; the I isomer, a side product, is excreted in the feces and urine in congenital erythropoietic porphyria.

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coproporphyrin (kop´rpor´firin),

n a nitrogenous organic substance normally excreted in the feces as a breakdown of bilirubin.

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coproporphyrin

a porphyrin formed in the blood-forming organs and intestine and found in the urine and feces. There are two chemically distinct substances, coproporphyrins I and III.