GUCY2D, also named as CORD6, GUC1A4, GUC2D, RETGC, RETGC1 and ROS-GC, belongs to the adenylyl cyclase class-4/guanylyl cyclase family. It probably plays a specific functional role in the rods and/or cones of photoreceptors. It may be the enzyme involved in the resynthesis of cGMP required for recovery of the dark state after phototransduction. A number of nonsense and frameshift mutations in the GUCY2D gene have been identified in LCA1 patients. Defects in GUCY2D are the cause of cone-rod dystrophy type 6 (CORD6). GUCY2D is responsible for many reported cases of autosomal dominant CRDs. The antibody is specific to GUCY2D.