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. 2021 Dec 16;19(1):65–70. doi: 10.1038/s41592-021-01341-x

Extended Data Fig. 5. Multiplexed FLIM of the LT-Fucci(CA) and Raichu-RhoA-CR biosensors.

Extended Data Fig. 5

a-e The activity of the GTPase RhoA as well as the cell cycle stage were followed over time for dividing cells. FLIM images are given for both Raichu-RhoA-CR and LT-Fucci(CA) labeled with MaP618-CA (1 μm) along with a transmission light image and the phasor plot 1 h 20 min before cytokinesis (a), 30 min before cytokinesis (b), shortly after cytokinesis (c), and 1 h 20 min after cytokinesis (d). The FLIM images are color-coded according to the scales in (e). The two biosensors could be easily multiplexed measuring fluorescence lifetime in the GFP channel (Clover-Raichu-RhoA-CR) and the CPY channel (LT-Fucci(CA)-MaP618). As expected mitotic cells initially showed low RhoA activity indicated by long donor fluorescence lifetimes (2.7 ns). However, closer to cytokinesis RhoA activity started to increase (2.6 ns) until a donor fluorescence lifetime of 2.5 ns was reached directly after cytokinesis. After division the cells reached even higher RhoA activity (2.2 ns)69. Scale bar, 10 μm.