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Molecular assay reagents intended to identify mutations in the crumbs homologue 1 (CRB1) gene, located at chromosome 1q31-q32.1, which encodes for a protein that is involved in photoreceptor morphogenesis in the retina. Mutations at this locus have been identified in patients with infantile early-onset Leber\'s congenital amaurosis, retinitis pigmentosa, and pigmented paravenous chorioretinal atrophy.
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