Coproporphyrinogens

**Definition:** Porphyrinogens which are intermediates in the heme biosynthesis. They have four methyl and four propionic acid side chains attached to the pyrrole rings. Coproporphyrinogens I and III are formed in the presence of uroporphyrinogen decarboxylase from the corresponding uroporphyrinogen. They can yield coproporphyrins by autooxidation or protoporphyrin by oxidative decarboxylation.

**Tree numbers:** - D03.383.129.578.840.500.700.250 - D03.633.400.909.500.700.250 - D04.345.783.500.700.250