To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 5 Confrontation assay between HaCaT cells (unlabelled) and HT1080 cells expressing the ERK FRET-biosensor. Blue to red represents an increase in ERK activity (FRET/CFP). 5 min frames. Scale bar = 50 μm. Heterotypic contact inhibition of locomotion can drive cell sorting between epithelial and mesenchymal cell populations Simon Brayford, Fiona N. Kenny, Toru Hiratsuka, Eduardo Serna-Morales, Lawrence Yolland, Andrei Luchici, and Brian M. Stramer J Cell Sci 2019. 132:None-None; doi: 10.1242/jcs.223974 Download Original Video