The gene causing the Best's macular dystrophy (BMD) encodes a putative ion exchanger

Best's macular dystrophy (BMD), also known as vitelliform macular degeneration type 2, is an autosomal dominant disease that causes loss of vision. The causative gene encodes a 585 amino acids protein called bestrophin with unknown function. From bioinformatics analysis, a putative ion exchanger function for bestrophin can be suggested.