Meindl Meindl A A Dry Dry K K Herrmann Herrmann K K A gene (RPGR) with homology to the RCC1 guanine nucleotide exchange factor is mutated in X-linked retinitis pigmentosa (RP3) A gene (RPGR) with homology to the RCC1 guanine nucleotide exchange factor is mutated in X-linked retinitis pigmentosa (RP3) Nat Genet Nat Genet 1996 1996 13 13 35 35 42 42 10.1038/ng0596-35 10.1038/ng0596-35 8673101 8673101. Here, RPGR is linked to retinitis pigmentosa 3.