_:vb50942968 . _:vb50942968 . _:vb50942968 . _:vb50942968 "url:https://www.ncbi.nlm.nih.gov/pubmed/9565049"^^ . _:vb50942968 "A retinitis pigmentosa that has_material_basis_in mutation in the SAG gene on chromosome 2q37."^^ . _:vb50942968 . _:vb50942968 .