Intermediates in the biosynthesis of porphyrins from porphobilinogen.
D010860:Pigments, Biological / Q000378:metabolism*; D011162:Porphobilinogen; D011166:Porphyrins / Q000378:metabolism*
D010860:Pigments, Biological; D011166:Porphyrins; D011162:Porphobilinogen
PIGMENTS/metabolism; PORPHYRIN/metabolism