- Autosomal dominant retinitis pigmentosa (adRP; RP6): cosegregation of RP6 and the peripherin-RDS locus in a late-onset family of Irish origin. Jordan, S.A., Farrar, G.J., Kumar-Singh, R., Kenna, P., Humphries, M.M., Allamand, V., Sharp, E.M., Humphries, P. Am. J. Hum. Genet. (1992)