RPGR and retinitis pigmentosa 1: RPGR mutations are also detected in RP patients (specifically males) where no family history is available, in apparently autosomal dominant RP families, and in patients with CRD and MD (Ayyagari et al., 2002; Branham et al., 2012; Churchill et al., 2013; Demirci et al., 2002; Sharon et al., 2003).