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Figure 4
Composite OMIT map. Blue trace, backbone of atomic model 1fbb rigid-body refined using the experimental data with sampling δqrod = (1/2)(π/d). Cyan surface, the composite OMIT electron-density map with a contour level of 3.0σ. The structure is shown from two different views.

IUCrJ
Volume 6| Part 1| January 2019| Pages 34-45
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518014641