Table 2. Calculated chiro-optical properties for DNA tetramers/ωB97XD/6-31G(d) + solvent=water
System	[α]589	ECD spectrumb	System	[α]589	ECD spectrumb
Z-(CGCG)	-65		Z-d(CGCG)2	+62
B-(CGCG)	+3		B-d(CGCG)2	-137
Z-(ATAT)	-21		Z-d(ATAT)2	+109
B-(ATAT)	+85		B-d(ATAT)2	-63