In the examination of all 75 RP disease-causing genes, we found an enrichment of the phototransduction (Cnga1, Cngb3, Guca1b, Pde6a, Pde6b, Rho, Sag) and rod retinoid pathway genes (Abca4, Lrat, Rdh12, Rbp3, Rlbp1, Rpe65) (Table 4). The gene discussed is RBP3; the disease is retinitis pigmentosa 1.