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Figure 8
A fragment of PDB structure 3e0k around the site of a rather improbable Na+ ion. The B factors (Å2) of the Na+ ion and selected neighboring atoms are shown in parentheses and the distances (in Å) of two close O and two H atoms are also shown. The 2mFo − DFc map (blue) is contoured at 1.5σ and the mFo − DFc map at ±2.5σ (positive contours, green; negative contours, red).

IUCrJ
Volume 1| Part 3| April 2014| Pages 179-193
ISSN: 2052-2525
doi:10.1107/S2052252514005442