CRB1 is a vertebrate homolog of the Drosophila crumbs gene , which is required for photoreceptor morphogenesis , and has been associated with either retinitis pigmentosa ( RP ) or LCA .
B-GeneOrGeneProduct O O O O O O B-OrganismTaxon B-GeneOrGeneProduct O O O O O O O O O O O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O B-DiseaseOrPhenotypicFeature O O B-DiseaseOrPhenotypicFeature O