_:vb50942982 "A retinitis pigmentosa that has_material_basis_in mutation in the CNGA1 gene on chromosome 4p12."^^ . _:vb50942982 . _:vb50942982 . _:vb50942982 . _:vb50942982 . _:vb50942982 . _:vb50942982 "url:https://www.ncbi.nlm.nih.gov/pubmed/7479749"^^ .