Table 2. Methyl signal line-width,ν_1/2, (Hz) in different solutions of decamer^a.

Sample	Monovalent cation (mM)	[K+] (mM)	pH	ν1/2
				T5	T4	T7
1	152	114	7.0	6.5	5.6	5.9
2	152b	114	7.0	7.8	4.3	6.3
	190c	114	7.0	6.7	3.8	5.3
3	152	114	7.0	4.9	4.3	4.5
4	118	0	6.0	15.0	9.0	11.1
5	228	114	6.0	7.0	4.2	5.2
6	152	0	6.0	21.1	17.0	19.7
7	190d	38	6.0	13.0	10.5	12.0

^aThe line-width of TSP signal is in the range of 0.8–1.2 Hz for all studied samples. Phosphate ion concentration is 38 mM in all samples except 5, which is 76 mM in phosphate ion. Samples 1–3 are in D₂O and 4–7 in H₂O/D₂O, 9:1 v/v.

^bOriginal sample 2.

^cSample 2 with 38 mM of NaCl added.

^dSample 6 with 38 mM of KCl added.