Schematic of Gene Therapy Vector (IMAGE) NIH/National Eye Institute Caption Gene therapy adeno-associated viral (AAV) vector includes sequences that encode both the shRNA knockdown element and the replacement rhodopsin protein. Credit Lesley Earl, National Eye Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.