Figure 1.

Rh1-shi^ts1 photoreceptor output depends on light history at 19°C. A, Dark adaptation (30 min) followed by light adaptation (30 min) at 19°C. B, ERGs were recorded (700 ms stimulus) after each adaptation. Traces are from dark-adapted flies and 6 d posteclosion. C, D, The amplitude of “On”-transients (C) and “Off”-transients (D) quantified for wild type (black), Rh1-shi^ts1 (red), and white Rh1-shi^ts1 (orange). Mean ± SEM is shown in traces and histograms with n = 6 for each group. Age refers to days posteclosion.