Definition of Uroporphyrinogens
1. Noun. (plural of uroporphyrinogen) ¹
¹ Source: wiktionary.com
Medical Definition of Uroporphyrinogens
1. 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. (12 Dec 1998)
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