_:vb50943048 . _:vb50943048 "url:https://www.ncbi.nlm.nih.gov/pubmed/8673101"^^ . _:vb50943048 . _:vb50943048 . _:vb50943048 "A retinitis pigmentosa that has_material_basis_in mutation in the RPGR gene on chromosome Xp11."^^ . _:vb50943048 . _:vb50943048 .