Table 2.

Average values of torsion angles (°), calculated for the eight central base pairs of the TATA-box in the X-ray (1), model and canonical DNA conformations.

Structure	χ	ɛ	ζ	α	γ	β	Phase
X-ray	−115	−150	−92	−73	54	166	66
Stretched (AT)n	−134	−157	−80	−74	58	179	35
Unwound (AT)n	−140	−157	−79	−72	58	175	45
Stretched TATA box	−131	−160	−79	−74	60	180	37
Unwound TATA box	−135	−161	−76	−73	59	176	42
A-DNA	−160	−155	−67	−75	59	181	18
B-DNA	−102	−133	−157	−41	37	136	155