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.

Annotation

porphyrins

DUI

D014577 MeSH Browser

CUI

M0022409

Previous indexing

Porphyrinogens (1975); Porphyrins (1971-1974)

History note

91(76); was see under PORPHYRINOGENS 1976-90

Public note

91; was see under PORPHYRINOGENS 1976-90