Before revision:  We analyzed the conformational change in these models by adding randomness to the local perturbation, finding that the robustness of the conformational states of the model to random perturbation decreases with an increase in the DNA length.
After revision:  We analyzed the conformational change in these models by adding randomness to the local perturbation, finding that the tendency of the system to remain in a stable conformation against random perturbation decreases with an increase in the DNA length.