Table 2. Torsion angles of bridged nucleosides.

Type	Bridged nucleoside	δ angle	Average δ angle
2′,4′-BNA/LNA	2′-O,4′-C-methylene adenosine	62.5°	66°
	2′-O,4′-C-methylene thymidine	68.5°, 66.9°
	2′-O,4′-C-methylene uridine	66.2°
ENA	2′-O,4′-C-ethylene adenosine	75.7°	77°
	2′-O,4′-C-ethylene-N2-isobutyrylguanosine	78.9°

These data were obtained from X-ray crystal structure analysis of bridged nucleotides (nos CCDC 195962–195965) (11,32).