
1.Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
2.College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China
3.State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
4.School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
5.College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
6.Bioland Laboratory, Guangzhou, 510005, China
7.Guangzhou Laboratory, Guangzhou, 510030, China
Tao Xu (xutao@ibp.ac.cn)
Wei Ji (jiwei@ibp.ac.cn)
Lusheng Gu (gulusheng@ibp.ac.cn)
Published:31 January 2023,
Published Online:2 January 2023,
Received:25 July 2022,
Revised:29 November 2022,
Accepted:2 December 2022
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Wu, W. Y. et al. Tetra-color superresolution microscopy based on excitation spectral demixing. Light: Science & Applications, 12, 99-108 (2023).
Wu, W. Y. et al. Tetra-color superresolution microscopy based on excitation spectral demixing. Light: Science & Applications, 12, 99-108 (2023). DOI: 10.1038/s41377-022-01054-6.
Multicolor imaging allows protein colocalizations and organelle interactions to be studied in biological research
which is especially important for single-molecule localization microscopy (SMLM). Here
we propose a multicolor method called excitation-resolved stochastic optical reconstruction microscopy (ExR-STORM). The method
which is based on the excitation spectrum of fluorescent dyes
successfully separated four spectrally very close far-red organic fluorophores utilizing three excitation lasers with cross-talk of less than 3%. Dyes that are only 5 nm apart in the emission spectrum were resolved
resulting in negligible chromatic aberrations. This method was extended to three-dimensional (3D) imaging by combining the astigmatic method
providing a powerful tool for resolving 3D morphologies at the nanoscale.
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