Progressive Retinal Atrophy
Body function: Eyes
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Progressive retinal atrophy is a degenerative eye disease caused by a deletion mutation in the CNGB1 gene. This disease was originally discovered in Papillon and Phalène dogs, but can affect many breeds. It causes the slow degeneration of the retina, ultimately resulting in blindness. Both parents must be carriers of PRA for a litter to be affected.
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