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Multi-color live-cell optical nanoscopy using phasor analysis

Zhang, Z.; Huang, Y.; Tao, W.; Wei, Y.; Xu, L.; Gong, W.; Zhang, Y.; Han, Y.; Kuang, C.; Liu, X.

2023-08-04 cell biology
10.1101/2023.08.04.551988 bioRxiv
Show abstract

Stimulated emission depletion microscopy (STED) is a powerful tool for studying nanoscale cell structure and activity, but the difficulties it encounters in multicolor imaging limit its application in biological research. To overcome the disadvantages of limited number of channels and high cost of multicolor STED imaging based on spectral identity, we introduced lifetime into live-cell multicolor STED imaging by separating selected dyes of the same spectrum by phasor analysis. Experimental results show that our method enables live-cell STED imaging with at least 4 colors, enabling observation of cellular activity beyond the diffraction limit.

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