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The unfolding times tunf as a function of the force applied. The solid thick line (with squares) and solid fine line (with asterisks) are for 1yh1 and 1yh1*, respectively; the dotted line (with circles) is for 1c9y. (Inset) For F̃ = 3.2 the protein is stretched instantaneously, without formation of any metastable states, and with small trajectory-to-trajectory variations.
