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  1. xmlghr-summaries.xml 
    https://medlineplus.gov/download/ghr-summaries.xml
    ... RPGR</html:i> gene. One version contains a segment known as the ORF15 ... (photoreceptors). Researchers suspect that this isoform may help maintain ...
  2. Nephronophthisis - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK368475
    ... zone of renal and respiratory cilia and photoreceptor connecting cilia. J Am Soc Nephrol. 2006; 17 :2424– ... Gleeson JG. AHI1 is required for photoreceptor outer segment development and is a modifier for retinal degeneration ...