Fig. 2From: Designing, construction and characterization of genetically encoded FRET-based nanosensor for real time monitoring of lysine flux in living cellsIn vitro fluorescence emission spectrum of FLIPK. The fluorescence emission was recorded by excitation at 435 nm in fluorometer without lysine (0 mM) and with lysine (1 mM). The concentration of sensor protein was 0.25 mg/mlBack to article page