
Fig. 3. Characterization of flash-induced ion currents of individual copd mutant cells. Photocurrents of an untransformed cw15arg-A cell and a copd13 transformant. Photocurrents (IP1) were plotted versus the photon exposure of the flash (Q). No intensity dependent differences in the amplitude of the photoreceptor current IP1 were observed in three cell lines with different Cop content.