Active Vertex Model for cell-resolution description of epithelial tissue mechanics
Fig 5
Time lapse of a T1 transition, each label is the time (in units of γ/Ka2, with a = 1) with respect to the T1 event.
Initially, cells 2 and 4 are in contact (red line). Approaching the transition, the connecting line slowly contracts, until it becomes a point at the transition. Cells 1 and 3 make a new contact which then rapidly expands. The arrows represent the force on the cell centre resulting from the Vertex potential (green), which partially compensates the active self-propulsion force (yellow) to give the resultant total force (red). The Voronoi tessellation is outlined in black, and the Delaunay triangulation is in white.