4.2.1.24 porphobilinogen synthase; aminolevulinate dehydratase; delta-aminolevulinate dehydratase; delta-aminolevulinic acid dehydrase; delta-aminolevulinic acid dehydratase; aminolevulinic dehydratase; delta-aminolevulinic dehydratase; 5-levulinic acid dehy • • •