Fluorescence Lifetime Imaging (FLIM) has emerged as a key technique to image the environment and interaction of specific proteins and dyes in living cells. FLIM of fluorescent molecular rotors allows mapping of viscosity in living cells.
Suhling, K., Levitt, J. A., Chung, P. H., Kuimova, M. K., Yahioglu, G. Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells. J. Vis. Exp. (60), e2925, doi:10.3791/2925 (2012).