Fig. 5: Light intensity dependence of KnChR-272, KnChR-397, and CrChR2.

The photocurrent was measured with various intensities of 480 nm light. a KnChR-272, b KnChR-397 and c CrChR2. Membrane voltage was clamped at −60 mV. Standard solutions were used (See “Methods”). Black circle, peak current; empty circle, steady-state current. Data were presented as the mean ± SEM. N = 6 (a), 4 (b), and 6 (c).