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