Figure 1
The steps of cell motility we considered in our model . (a) Cell rear is adhered to the substrate and the cell front is moving. (b) The length of the cell is increased toL1+ Δxf. (c) After the stress is reached to a certain degree (critical stress value) the rear of the cell detached and start moving forward while the front of the top is adhered to the substrate. (d) The rear of the cell moves as much as Δxr. (e) The process repeat with the new cell length which is equal to L1+ΔL where ΔL=Δxf–Δxr. Note that the length of the cell cannot stretch indefinitely and it will reach to a point that the rear and front of the cell have same displacement.