Light-induced charge separation and transfer in bacteriorhodopsin

The photo-voltage signals in bacteriorhodopsin(bR) excited by 1064 nm pulse laser are different from those by 532 or 355 nm. It shows that the positiv e and negative photoelectric signals are produced by the motion of the posi tive and negative charges, respectively and more energy is needed for produ cing the positive charges than the negative. The mechanism of light-induced charge generation and charge transfer in bn was studied and analyzed by me asuring the photoelectric signals with different impedance of measuring cir cuit and different pulse-width of 532 nm laser as pump light.