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Figure 2
Crystal packing and tetrahedral assembly of ApePCNA2. Among the four molecules in the asymmetric unit, three molecules (chains A, B and C; shown as green cartoons) form a homotrimer via noncrystallographic threefold symmetry. Two additional trimers generated by the crystallo­graphic symmetry are shown as yellow and gray surface models. The remaining molecule (chain D; dark blue cartoon) forms another homotrimer with its symmetry mates (light blue cartoons). Consequently, four homotrimers are assembled into a tetrahedral cluster within the crystal lattice.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
Volume 82| Part 6| June 2026| Pages 216-221
https://doi.org/10.1107/S2053230X26003687
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