Table A.1.

Effect of local conformational coupling on the lowest-frequency normal twisting mode of a 100 bp ideal DNA homopolymer^*

Coupled variables	${\nu }_1^0$† (cm-1)	${\nu }_1^{\mathrm{eq}}$† (cm-1)	ΔC§ (%)
	0.189	0.189
Tilt-Roll	0.189	0.189	0.0
Tilt-Twist	0.188	0.188	-0.5
Tilt-Shift	0.189	0.189	0.0
Tilt-Slide	0.189	0.189	0.0
Tilt-Rise	0.189	0.189	0.0
Roll-Twist	0.187	0.187	-1.3
Roll-Shift	0.189	0.189	0.0
Roll-Slide	0.189	0.189	0.0
Roll-Rise	0.189	0.189	0.0
Twist-Shift	0.188	0.188	-0.5
Twist-Slide	0.188	0.188	-0.4
Twist-Rise	0.185	0.197	9.1
Shift-Slide	0.189	0.189	0.0
Shift-Rise	0.189	0.189	0.0
Slide-Rise	0.189	0.189	0.0
Roll-Twist, Twist-Rise	0.187	0.199	11.5
Twist-Slide, Twist-Rise	0.186	0.199	11.0
Roll-Twist, Twist-Slide	0.191	0.191	2.1
Roll-Twist, Twist-Slide, Twist-Rise	0.185	0.197	8.9

^*Dimeric rest state: $({\theta }_1^0,{\theta }_2^0,{\theta }_3^0,{\theta }_4^0,{\theta }_5^0,{\theta }_6^0)=(0°,0°,36°,0\mathrm{Å},0\mathrm{Å},3.4\mathrm{Å})$.

^†Frequencies of DNA chains subject to the same global constraints as in Table 3.1.

^§Change in torsional modulus of the restrained duplex subject to given conformational coupling compared to that (C = 2.05 × 10^-19 erg-cm) of the unrestrained, ideal molecule with independent fluctuations of base-pair step parameters. See legend to Table 3.1.