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. Author manuscript; available in PMC: 2012 Jan 1.
Published in final edited form as: Nat Methods. 2010 Dec 20;8(1):35–38. doi: 10.1038/nmeth.f.326

figure 3.

figure 3

Reversibility and spatial precision. (a) Optogenetics allows the investigator to apply spatially restricted light inputs (orange). However, diffusion of protein activity (red) from the site of activation destroys the applied spatial pattern. (b) Faithful spatial patterns can be maintained by coupling local activation with global inactivation (green), either by implementing an inactivating light wavelength or a short-lived active state.