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Figure 4
Hydrogen-bond networks in the region of the symmetry axis in the primary dimer as revealed by the 2Fo − Fc neutron map. The central water molecule is trapped between the Tyr116 η-hydroxyl groups and the Glu92 backbone carbonyl and amide groups. The water molecule establishes a very close hydrogen bond with Tyr116 in the B-chain, whereas the η-hydroxyl group of the A chain tyrosine points away from the water-oxygen atom to avoid steric hindrance.

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