Keywords: δ-آمینولولولین سنتاز; ABC; ATP-binding cassette; ABCB7; ATP-binding cassette subfamily B member 7; ALA; δ-amino levulinic acid; ALAS; δ-aminolevulinate synthase; CCA; cytosine/cytosine/adenine; CoA; glycine and succinyl-coenzyme A; CSA; congenital sideroblastic anemia; EPP;