Figure 2 .

Photocurrents generated by the indicated KCRs at –40 mV under physiological ionic conditions in response to a 1-s light pulse, the duration of which is shown by the colored bars. The current traces were normalized at the peak value. The numbers show desensitization (reduction of photocurrent at the end of the light pulse in % of the peak value) and the time of half-amplitude reduction of photocurrent after the light is turned off. The grey area shows the s.e.m. (n=5–7 cells).