Table 1.

The numbers of hydrogen bonds of different types in the complex structures of KH1–GUUUAG and KH2–CAGAGU

	KH1–GUUUAG						KH2–CAGAGU
	U0	U1	U2	A3	G4	All	A1′	G2′	A3′	G4′	All
Side chain–nucleobase	2	2	0	2	1	7	1	0	2	0	3
Side chain–RNA backbone	3	1	1	0	0	5	0	2	2	2	6
Main chain–nucleobase	0	0	2	1	2	5	3	4	1	2	10
Main chain–RNA backbone	0	1	0	1	0	2	0	0	1	0	1
Total	5	4	3	4	3	19	4	6	6	4	20