Table 1.

Hydrogen bonds for Rsg-Met.

D-H...A	d(D-H)/Å	d(H...A)/Å	d(D...A)/Å	D-H-A/°
N(4)-H(4C)...N(6) 1	0.847	2.263	3.110	178
N(4)-H(4D)...N(1) 2	0.88	2.00	2.720	138
N(5)-H(5A)...O(1) 3	0.84	2.14	2.988	178
N(5)-H(5B)...O(1) 2	0.91	2.19	3.083	167
N(7)-H(7A)...O(2) 4	0.86	2.26	3.086	161
N(7)-H(7B)...N(4) 3	0.93	1.89	2.758	154

Symmetry transformations used to generate equivalent atoms: ¹ 1 − x, −y,1 − z; ² −x, 1 − y,1 − z; ³ 1 + x, +y, +z; ⁴ 1 − x,1 − y,1 − z.