2019 Volume 59 Issue 3 Pages 125-131
Fluorescence correlation spectroscopy (FCS) is a potential tool to measure the dynamics of fluorescent molecules, either in solution or in a cell. FCS can quantify the diffusion coefficient, the target molecule concentration, and brightness of a single molecule. These parameters allow estimations of the molecular size, the molecular shape, and the affinities of molecular interactions. Moreover, varieties of FCS methods have been developed on the concept of the fluorescence lifetime, triplet state, decrease of fluorescent intensity and toward two-dimensional imaging, in order to reveal the molecular interaction in live cell and molecular crowding.
