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Figure 6
Four protein molecules in the unit cell of PDB entry 1woc . (a) Original presentation as one dimer and two monomers; (b) after regrouping by an appropriate symmetry operation it is clear that this structure consists of two identical dimers.

IUCrJ
Volume 1| Part 3| April 2014| Pages 179-193
ISSN: 2052-2525
doi:10.1107/S2052252514005442