Summary: Porphobilinogen deaminase (PBGD). the third enzyme in the heme biosynthesis. catalyzes the sequential coupling of four porphobilinogen (PBG) molecules into a heme precursor. Mutations in PBGD are associated with acute intermittent porphyria (AIP). https://parisnaturalfoodes.shop/product-category/amino-energy-watermelon/