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Discontinuous structural transitions at particular elongations due to disappearances of energy minima. (a) ζ = 4.782 σ (this structural change is associated with the results in Fig. 3). (b) ζ = 18.705 σ (this structural change occurs at the maximum force that the partially folded protein can sustain, see Fig. 2). (c) ζ = 25.069 σ.
