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. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: J Opt. 2016 Aug 18;18(9):093007. doi: 10.1088/2040-8978/18/9/093007

Figure 4.

Figure 4

Genetically encoded and targetable actuator proteins that allow the use of light to either excite or inhibit action potential generation of neurons. Excitation and Inhibition is exemplified by the light-gated ion channel channelrhodopsin 2 (ChR2) and anion channel rhodopsin (ACR) [23].