Retinal (Visual pigment) (15) Retina (13) Rats (11) Animals (11) Cells (10) Rhodopsin (9) Methods (8) Mice (8) Eye (8) Expression (8) Epithelium (8) Methods (8) Retinal degeneration (7) Human beings (7) protein (6) model (6) Treatment (6) Control (6) Photoreceptors (6) Example (6) Cell death (6) Older people (6) therapy (5) loss (5) analysis (5) effect (5) Diseases (5) Death (5) Therapeutics (5) RNA (5)