Fig. (3) (a) Change of the reaction force F applied to terminuses of protein G in points of fixation, depending on distance r_NC between them. There are 10 curves for extension velocity v=0.0625 Å⋅ps-1. (b, c, d) Dependence of force (curve 2) and number of contacts between β-strands 1 and 4 (curve 1) on time for protein G for representative trajectories with two-state (b), three-state (c) and four-state events (d). Structures correspond to force peaks. Structures of the first (e) and second (f) intermediates for representative trajectories.