Figure 3.

Energy diagram of the active dimer. Two branches of the dependence of elastic energy E on distance x between the beads for configurations with (s = 1) and without (s = 0) a ligand are shown. Transitions between the branches occur at x = l₀ and x = l₁; they are followed by relaxation to new equilibrium states. Within each turnover cycle, energy ΔE₀ + ΔE₁ is dissipated in mechanical motions and the same energy is externally supplied through the ligand. (Online version in colour.)