Table 3. Number (N) of choline and sodium ions within 3.5 Å of Ts1, Ts2 and Ts3 DNA strands, and the energy changes (ΔE) of third-strand binding to duplex with choline or sodium ions.

	NaCl		Choline dhp
	N	ΔE (kcal mol−1)	N	ΔE (kcal mol−1)
Ts1	9.8±2.3	−61.3±6.7	27.8±3.5	−115±11
Ts2	7.9±2.2	−83.5±5.8	30.6±3.0	−115±15
Ts3	9.5±2.4	−84.7±6.4	26.9±4.0	−129±14