Photoactivated localization microscopy (PALM) combined with single-molecule tracking allows direct observation and quantification of protein-DNA interactions in live Escherichia coli cells.
Uphoff, S., Sherratt, D. J., Kapanidis, A. N. Visualizing Protein-DNA Interactions in Live Bacterial Cells Using Photoactivated Single-molecule Tracking. J. Vis. Exp. (85), e51177, doi:10.3791/51177 (2014).