Figure 5. Pd^−/− RBCs exhibit less reduction of dim-flash response amplitude and suppression of r_max than WT RBCs in the presence of background light.

(A) Composite I-R relationships created by fitting Hill equations to the averaged response amplitudes ± SEM of 12 WT and 10 Pd^−/− dark and light-adapted RBCs. Dark-adapted data points (filled symbols) were determined by averaging response amplitudes recorded before after recording light-adapted flash families in the presence of 51 R*/rod/sec background light (open symbols). (B) Averaged normalized responses of the same cells to a flash estimated to elicit approximately 1 R*/rod in the presence of the 51 R*/rod/sec background light.