_:vb50942989 . _:vb50942989 . _:vb50942989 . _:vb50942989 . _:vb50942989 "A retinitis pigmentosa that has_material_basis_in mutation in the TULP1 gene on chromosome 6p21."^^ . _:vb50942989 "url:https://www.ncbi.nlm.nih.gov/pubmed/9462751"^^ . _:vb50942989 .