(A) Crystal structure of GB1 (PDB: 2LGI) with Glu and Gln aliphatic groups shown
in van der Waals spheres and coded with color scaling to values. Two different perspectives are
shown for better visualization. (B) E27, (C) E56, (D) Q32, (E) E42,
(F) E15, (G) E19, and (H) Q2 local chemical environment in GB1. Aliphatic
groups having deuterium values undetermined are color coded with
cyan. The residues having atoms within 5 Å away for the corresponding
Glu or Gln residue are shown in sticks. The salt bridge between E27
and K31 and the hydrogen bond between E56 and D40/K10 are presented
by dashed lines.