  We model and simulate the stepping dynamics of the kinesin motor including
electric and mechanical forces, environmental noise, and the complicated
potentials produced by tracking and neighboring protofilaments. Our dynamical
model supports the hand-over-hand mechanism of the kinesin stepping. Our
theoretical predictions and numerical simulations include the off-axis
displacements of the kinesin heads while the steps are performed. The results
obtained are in a good agreement with recent experiments on the kinesin
dynamics.
