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. 2000 Aug 1;97(17):9476–9481. doi: 10.1073/pnas.160271897

Table 2.

Base-pair and base-step morphological parameters, calculated with the curves program (28), for the two independent duplexes. These are listed as the pseudododecanucleotide duplex, and the two end base pairs are C1-G12 and G18-C19. Propeller twist, buckle, roll, and twist are in °, and slide is in angstroms.

Pr twist Buckle
Base pairs
Duplex 1
 C1-G12 29 −12
 C2-G11 −22 −11
 T3-A10 −10 5
 A4-T9 −13 −1
 G5-C8 −17 19
 G6-C7 −28 3
Duplex 2
 C13-G24 −28 −5
 C14-G23 −12 −18
 T15-A22 −13 2
 A16-T21 −11 −3
 G17-C20 −22 11
 G18-C19 24 15
Base steps Roll Twist Slide
 C1pC2 −7 34 −0.6
 C2pT3 16 28 −0.1
 T3pA4 −12 46 0.9
 A4pG5 15 24 0.5
 G5pG6 −8 41 0.1
 G6pC13 2 46 −1.9
 C13pC14 −9 40 0.1
 C14pT15 16 24 0.5
 T15pA16 −13 47 1
 A16pG17 16 27 −0.1
 G17pG18 −7 35 −0.5