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. 2014 Nov 22;70(Pt 12):3144–3154. doi: 10.1107/S1399004714022500

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© Wang et al. 2014

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

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Ribbon views of the DrTS dimer (a) and monomer (b) structures. The protein consists of a (β/α)₈ barrel (red), subdomain B (blue), domain C (cyan) and two TS-unique modules (S7 in green and S8 in yellow). The bound Mg²⁺ and Ca²⁺ ions are shown as green and magenta spheres, respectively, with the Tris molecule shown as a stick representation. The dimeric interfaces are formed mainly by domain C and S8 and have a total buried area of ∼3000 Å².