RLBP1 and retinitis pigmentosa 1: Retinaldehyde-binding protein 1 (RLBP1) is an autosomal recessive RP-related gene, encoding RLBP1, a protein that is expressed by Müller glial and RPE cells.65 RLBP1 participates in the regeneration of the visual chromophore and is part of the visual cycle proteins.