TABLE 4.

Minimum refined P-P distances along the minor groove in the central AATT track

	d(AATT)2	d(AA)·d(TT)	d(AT)·d(AT)	d(TT)·d(AA)
L-WWWW	10.9 ± 0.6	10.6 ± 0.9	10.0 ± 0.8	10.6 ± 0.8
L-IIIII	10.8 ± 0.6	10.3 ± 0.7	10.1 ± 0.6	11.0 ± 1.1
H-WWWW	11.0 ± 0.8	10.8 ± 1.0	10.5 ± 1.1	11.0 ± 1.2
H-IIII	10.6 ± 0.6	10.5 ± 0.7	10.0 ± 0.5	10.3 ± 0.7

Average values (in Å) for the entire track and for each step are reported. Refined distances were computed using standard defaults in 3DNA. The standard deviations in the averages are also shown in Å.