Number of folded -helical (left column) and strand (right column) residues as a function of time normalized by the unfolding time.

<p>Within each panel: the blue dashed line is at the highest force, 3000 pN; the black dashed line is at the lowest force, 750 pN for barnase and RNase H, or 875 pN for ubiquitin; the blue (black) solid line is an average over a set of the highest (lowest) forces. When viewed versus normalized time, some trajectories, such as the unfolding of barnase's helices and RNase H's strands, are invariant to force.