Description_x000D_ Application_x000D_ 5-Aminolevulinic acid formed from glycine and succinyl CoA by ALA synthase is the first compound in prophyrin biosynthesis pathway. 5-Aminolevulinic acid is used in photodynamic therapy. This compound may be used to study the effects of photodynamic therapy in vitro._x000D_ Packaging_x000D_ 1 g in glass bottle_x000D_ 10, 500 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Intermediate in heme biosynthesis.