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Figure 3
(a) Copper site I and (b) copper site II in the 1.45 Å resolution Cu insulin structure. Cu2+ is coordinated to three HisB10 residues and three water molecules (red) in site I, whereas the coordination is more ambiguous in site II. Distances to the first coordination sphere as determined by single-crystal X-ray diffraction are shown. The σA-weighted 2Fo − Fc maps are contoured at 1.0σ.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
Volume 70| Part 1| December 2014| Pages 110-122
doi:10.1107/S1399004713029040
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