CNGA1 and autosomal recessive retinitis pigmentosa: In the present study, we have identified a family (DKRRP2) with autosomal recessive retinitis pigmentosa suffering from a homozygous c.1525 G > A (NM_001379270.1) missense mutation in CNGA1 leading to substitution of a Gly at position 509 by an Arg.