Table 1.

Summary of fitting parameters (Equation (5)) for magnetic tweezers/TIRF experiments^a

dx (cm)	$L_{\mathit{\text{ss}}}^{\text{max}}/d$	d (nm) $(L_{\mathit{\text{ss}}}^{\text{max}}=116\text{ nm})$	SF (pN A−1)	I0
0.125	0.992±0.003	117.0±0.3	25.4±0.3	1.088±0.003
0.150	0.907±0.002	127.9±0.3	25.8±0.3	1.021±0.003
0.175	0.836±0.003	138.7±0.5	24.2±0.3	1.042±0.003
0.200	0.834±0.002	139.0±0.3	24.0±0.2	1.048±0.002

^aThe error indicated is the standard deviation of the fit coefficient.