Table 3. Torsion angles (°) and sugar conformation.
| Sequence | P–O5′ | O5′–C5′ | C5′–C4′ | C4′–C3′ | C3′–O3′ | O3′–P | C1′–N | Phasea | Pucker |
|---|---|---|---|---|---|---|---|---|---|
| α | β | γ | δ | ε | ζ | χ | θ | ||
| G | – | – | 160 | 149 | –134 | 156 | –124 | –133 | C4′-endo |
| Parallel | |||||||||
| C | –57 | 165 | 57 | 137 | –174 | –69 | –120 | 150 | C2′-endo |
| G | –74 | –176 | 49 | 139 | –155 | 154 | –82 | 154 | C2′-endo |
| A | –59 | 135 | 55 | 95 | –136 | –65 | –175 | 31 | C3′-endo |
| A | –67 | 172 | 43 | 87 | –145 | –69 | –124 | 15 | C3′-endo |
| Anti-parallel | |||||||||
| A | –74 | –156 | 51 | 147 | –162 | –98 | –114 | 166 | C2′-endo |
| G | –62 | 170 | 39 | 150 | –124 | 174 | –86 | 153 | C2′-endo |
| C | –49 | 132 | 45 | 130 | –173 | –110 | –110 | 141 | C1′-exo |
| T | –68 | 173 | 49 | 88 | – | – | –124 | 44 | C4′-exo |
aPseudo-rotation phase angle of ribose ring.