Figure 4. IR knock-down rods have a more rapid rate of response recovery than WT rods.

(A), mean single-photon responses of 14 WT rods (black) and 16 IR knock-down (IR-KD) rods (gray), calculated from squared mean and variance as in (39,40). Arrows point to best-fitting single exponential decay functions, with time constants as indicated. (B), single-exponential decay time constant (τ_REC) plotted as a function of light intensity for 14 WT strain-control rods, 15 Grb14^−/− rods, and 17 IR knock-down rods. Data are given as means ± SEM.