Anemia, Sideroblastic, 1, also known as xlsa, is related to hypochromic microcytic anemia and atransferrinemia. An important gene associated with Anemia, Sideroblastic, 1 is ALAS2 (5'-Aminolevulinate Synthase 2), and among its related pathways/superpathways are Metabolism and Transport of inorganic cations/anions and amino acids/oligopeptides. The drugs Fludarabine and Tacrolimus have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and liver, and related phenotypes are muscle weakness and fatigue