Table 1. Comparisons of polymer properties for dsDNA and ssDNA, including dsDNA in saturating concentrations of mono Ru intercalator (Ru1) and flex-Ru2. All parameters determined from fits to Equation (1), which are shown in Figure 2.

Polymer	= xds.(1+γ0) (nm/bp)	A (nm)	S (pN)
dsDNAa	0.340 ± 0.001	47 ± 2	1270 ± 200
dsDNA + Ru1b	0.41 ± 0.01	14.3 ± 0.8	320 ± 17
dsDNA + flex-Ru2c	0.49 ± 0.01	2.9 ± 0.8	800 ± 50
ssDNAd	0.680 ± 0.002	1.2 ± 0.1	1220 ± 70

^aData from Wenner et al. (27).

^bData from Vladescu et al. (4).

^cFrom this work.

^dSingle-stranded DNA (34 kbps length) in the same solution conditions as the dsDNA in this work.

Values and uncertainties were determined from the minimization of χ² method.