See Also: uroporphyrinogens(medicine)
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uroporphyrinogens (medicine)


uroporphyrinogens
Porphyrinogens which are intermediates in haem biosynthesis. They have four acetic acid and four propionic acid side chains attached to the pyrrole rings. Uroporphyrinogen I and III are formed from polypyrryl methane in the presence of uroporphyrinogen III cosynthetase and uroporphyrin I synthetase, respectively. They can yield uroporphyrins by autooxidation or coproporphyrinogens by decarboxylation.