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Photoswitch Biosciences was formed to develop and commercialize applications of photoswitch molecules. We are located in Menlo Park and are part of the QB3 Mission Bay Network.



Photoswitches are a family of small-molecules designed to photo-modulate the activity of specific signaling proteins: One color turns the protein ‘on’; a different color turns it ‘off’. Photoswitches were conceived at the Nanomedicine Development Center for the Optical Control of Biological Function at UC Berkeley.