Table 1. Chemical shift assignments in p.p.m. for the GTAC region of the 2.5 mM sample of 1.

Base	H1′	H2′	H2″	H3′	H4′	H8/H6	H2/H5/Me	NH imino	NH2
G6 α	5.67	2.41	2.42	4.89	4.29	7.52		12.73
G6 β	5.67	2.41	2.42	4.92	4.29	7.55
Abasic α	5.26	1.96	1.83	4.49	4.38
Abasic β	5.33	1.87	2.06	4.42	4.05
A8	6.35	2.81	2.96	5.00	4.48	8.39	7.70
C9	5.81	1.90	2.45	4.72	4.22	7.31	5.26		6.73
									8.07
G18 α	5.79	2.41	2.57	4.87	4.36	7.55		12.66
G18 β	5.79	2.40	2.56	4.87	4.36	7.53		12.66
T19 α	5.74	1.95	2.29	4.72	4.21	7.05	1.23	14.16
T19 β	5.73	1.94	2.26	4.70	4.21	7.02	1.18	14.16
A20 α	6.10	2.52	2.68	4.92	4.35	8.14	7.37
A20 β	6.11	2.51	2.68	4.92	4.35	8.16	7.37
C21 α	5.91	2.23	2.51	4.76	4.28	7.67	5.67
C21 β	5.91	2.22	2.51	4.76	4.26	7.67	5.67