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Figure 4
The 2Fo − Fc electron-density maps contoured at the 0.8σ level (purple mesh) for N-ethylmaleimide-conjugated Cys145 (a) and Cys156 (b) observed in structure III.

IUCrJ
Volume 7| Part 6| November 2020| Pages 1028-1035
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520012634