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 RDH12; the disease is retinitis pigmentosa 1.