Gene for autosomal dominant congenital stationary night blindness maps to the same region as the gene for the β-subunit of the rod photoreceptor cGMP phosphodiesterase (PDEB) in chromosome 4p16.3

Abstract
We studied a large multigeneration Danish family with autosomal dominant congenital stationary night blindness. Both electrophysiological and psycho-physical findings in affected family members were identical to those reported in patients from the ‘Nougaret family’. The disease locus in the Danish family has now been mapped by demonstrating close linkage without recombination (Q = 0.00 at Z max= 14.4) to the locus for alpha-L-iduronidase assigned to chromosome 4p16.3. Interestingly the gene for the β-subunit of the rod photoreceptor cGMP-specific phos-phodiesterase maps to the very same chromosomal region.