PRPF6 and retinitis pigmentosa 1: Retina-specific mis-spliced transcripts have not yet been identified in PRPF6, PRPF8, and SNRNP200-associated RP, although data from PRPF31-defective RP patient retinal pigment epithelium (RPE) and retinal organoids has identified retinal-specific mis-splicing events (Ru°žičková and Staněk, 2017; Buskin et al., 2018).