MeSH definition : Porphyrinogens which are intermediates in heme 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.;
Porphyrinogens which are intermediates in heme 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.