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Typical transretinal flash response families from (A) WT and (B) GRK1 overexpressing (Grk1+) retinas evoked by 500-nm flashes of 20 ms duration. Flashes of incremental intensities, in 0.5 log steps, were delivered at time 0. The dimmest flashes delivered 27 photons μm-2. (C) Averaged normalized rod dim flash responses for WT (black; n = 8) and Grk1+ (gray; n = 6) retinas.
