FTL and hereditary hyperferritinemia with congenital cataracts: Accordingly, mutations in the iron storage protein FTL (ferritin light polypeptide) and the iron exporter SLC40A1 (solute carrier family 40 [iron-regulated transporter] member 1) are linked with cataract in the disease phenotype of hyperferritinemia-cataract syndrome (OMIM #600886), most probably as a result of increased radical production catalyzed by iron.