Fig. (2) (a) Change of the reaction force F applied to termini of protein G in points of fixation, depending on distance r_NC between them. There are 10 curves for extension velocity v=0.125 Å⋅ps-1. (b, c) 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. Structures correspond to force peaks. (d) Structure of the first intermediate for representative trajectory.