Table 3. Chemical shifts of imino protons in GPX SECIS.

Base	δHN (p.p.m.)	Type	AH2	CN4H
G2C57	13.42	GC		8.63, 6.95
G56C3	13.29	GC		8.65, 6.93
G55C4	12.78	GC		8.45, 6.88
G11C44	12.18	GC		8.13, 6.85
G12C33	12.62	GC		8.31, 6.85
U13A42	13.95	AU	7.40
G14C41	12.19	GC		8.13, 6.85
G38C18	12.64	GC		8.35, 6.82
G37C19	13.09	GC		8.3, 6.88
U20A36	13.79	AU	7.39
G35C21	12.53	GC
G	13.29	GC
G	12.88	GX
>7 G,U	10–12 unpaired