Porphyrinogens are a class of molecules in porphyrin biosynthesis
that contain four porphobilinogen
molecules. Examples of porphyrinogens include uroporphyrinogen
III, coproporphyrinogen III, and protoporphyrinogen IX
(Figure 21.30).
See also: , Porphyrin and Heme Metabolism
INTERNET
LINKS:
1. Porphyrin and Chlorophyll Metabolism