Figure 4.
Response rise time and recovery in WT and wt6C rods. A, Superimposed averaged responses of WT (black traces) and wt6C (red traces) rods at a flash intensity of 17 photons μm−2. B, As in A but at 160 photons μm−2. C, As in A but at 1120 photons μm−2. Data were filtered at 30 Hz (eight-pole Bessel) and sampled at 100 Hz. The data in A–C were averaged from 31–34 WT and 18–20 wt6C rods after normalizing to the maximum photo current for each rod. The inset in each panel shows the rising phases of the responses on an expanded time scale with SE at 10 ms intervals. D, Pepperberg plots of WT and wt6C rods. Time in saturation, Tsat, was estimated from the time for recovery to 25% of a dark circulating current after presentation of a bright flash. The dominant time constant for response turnoff was estimated from the best-fitting slope for intensities from 450 to 3250 photons μm−2.