Aminolevulinic acid dehydratase (porphobilinogen synthase, or ALA dehydratase, or aminolevulinate dehydratase) is an enzyme (EC4.2.1.24) that in humans is encoded by the ALADgene.[5][6]Porphobilinogen synthase (or ALA dehydratase, or aminolevulinate dehydratase) synthesizes porphobilinogen through the asymmetric condensation of two molecules of aminolevulinic acid. All natural tetrapyrroles, including hemes, chlorophylls and vitamin B12, share porphobilinogen as a common precursor. Porphobilinogen synthase is the prototype morpheein.[7]
^Beaumont C, Foubert C, Grandchamp B, Weil D, Gross MS, Nordmann Y (May 1984). "Assignment of the human gene for delta aminolevulinate dehydrase to chromosome 9 by somatic cell hybridization and specific enzyme immunoassay". Annals of Human Genetics. 48 (2): 153–9. doi:10.1111/j.1469-1809.1984.tb01010.x. PMID6378062. S2CID24098976.