Figure 3.

(A–D) Force-extension curves of the three different sequences of ssDNA from Table 1 in various ionic conditions, as indicated. Low- and high-force data are scaled as in Fig. 2. (Insets) Same data on linear axes to better visualize the area between curves. (In panel D, the solid and dashed curves are the same as in Fig. 2.) To see this figure in color, go online.