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. 2018 Jan 10;5(Pt 2):130–140. doi: 10.1107/S2052252517017833

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© Margarita Dimova et al. 2018

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

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The stochastic nature of protein crystal contacts. (a) A salt bridge in ensemble member 90 in the structure of HIV hydrolase between GluA21 of the reference molecule and LysA43 of the symmetry-related molecule forms a cohesive interaction that is part of the crystal lattice. (b) In ensemble member 40 in the structure of HIV hydrolase, GluA21 of the reference molecule and LysA43 of the symmetry-related molecule contact by means of electrostatic interaction. (c) Salt bridge and van der Waals interactions in ensemble member 28. (d) In ensemble member 1 in the structure of HIV hydrolase GluA21 and LysA43sym are not located at a proximity to form a lattice contact.