They are non-HFE hemochromatosis type 2A (HFE2, encoding HJV), type 2B (HAMP, encoding hepcidin), type 3 (TfR2, encoding transferring receptor-2) and types 4A and B (SLC40A1, encoding ferroportin). This evidence concerns the gene SLC40A1 and hemochromatosis type 2A.