Fig. 4: Action spectrum of KnChR-272 and KnChR97.

Wavelength dependency of the photocurrent. The photocurrents were measured in standard solutions. The membrane voltage was clamped at −40 mV. Red, KnChR-272 (N = 5), Black, KnChR-397 (N = 6). Data were presented as the mean ± SEM.