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Figure 6
Cluster of three buried water molecules. The 2Fo − Fc neutron difference map unambiguously detects the orientation of the water molecules and the hydroxyl group of Thr75. The protonation state of His88 can be readily identified.

IUCrJ
Volume 1| Part 6| October 2014| Pages 429-438
ISSN: 2052-2525
doi:10.1107/S2052252514021113