Pyrrole Rings
N
CH3
CH2
CH2
.
HOOC
glycine
+
Succinyl CoA
d-Aminolevulinic acid
Aminolevulinic
acid synthase
Monopyrrol
porphobilinogen
ALA
dehydrase
B6
Zn
2 d-Aminolevulinic acid
This
enzyme is inhibited by lead
*m
*c
*m =
in mitochondria
*c =
in cytoplasm