Spectroscopic properties of monomeric photoswitchable proteins which change color on illumination.

φsw: quantum yield of photoswitching, φflin: fluorescence quantum yield of an initial state, εin: molar extinction coefficient of an initial state, φflsw: fluorescence quantum yield of a photoswitched state, εsw: molar extinction coefficient of a photoswitched state, φbl: photobleaching quantum yield of the photoswitched state. *The spectroscopic properties of KikGR are also listed as a reference.