Table 2.

Atom pairs in the loop of the calculated structures that are within hydrogen bonding distance

H-donor	H-acceptor	distance
t6A37:OH14	C32:O2	1.35 (0.02)
C34:N4	t6A37:O13a	2.47 (0.15)
U33:O2′	A35:N7	2.89 (0.07)
C32:N4	A38:N1	2.64 (0.04)

Distances and their RMSD in the 20 selected structures are listed in Å.

^aO13A or O13B, whichever is turned towards C34:N4.