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GluR1 flop-to-flip ratio in rat retina under LD 12:12 or constant illumination (top). Note the recovery of flop-to-flip ratio under LD 12:12 (dotted lines) when removed from constant illumination. The bottom shows theONL thickness in each group. When light-reared animals were removed to LD 12:12 at P22, retinal degeneration did not progress after P21. Each data point indicates the mean ± SEM of the values obtained from three or four independent experiments. *p < 0.05; **p < 0.01.
