To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video S2 Reversible OptoEphB2 clustering. MEF cells expressing OptoEphB2-mCherry exposed to periodical blue light illumination and followed via mCherry fluorescence. The blue dot denotes the time of blue light illumination. Optogenetic activation of EphB2 receptor in dendrites induced actin polymerization by activating Arg kinase Clifford Locke, Kazuya Machida, Yi Wu, and Ji Yu Biology Open 2017. 6:1820-1830; doi: 10.1242/bio.029900 Download Original Video