EC 4.2.1.24 DELTA-AMINOLEVULINATE DEHYDRATASE PORPHOBILINOGEN SYNTHASE D-aminolevulinate dehydratase from*bovine liver DELTA-AMINOLEVULINATE DEHYDRATASE FROMBO VINE LIVER δ-aminolevulinate dehydratase from bovine liver Porphobilinogen synthase, 5-Aminolevulinate Hydrolyase (adding 5-aminolevulinate and cyclizing) 5-AMINOLEVULINATE HYDROLYASE [ADDING 5-AMINOLEVULINATE AND CYCLIZING]