Tetrameric Iris Fluorescent Protein.
Nature Methods, vol 7, no.8, August 2010
A monomeric version of the tetrameric Iris fluorescent protein is described that is useful for live-cell imaging. It can be irreversibly photoswitched from a green to a red form which will permit pulse experiments. Also useful for the study of assemble and disassembly of focal adhesions in living cells.