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Re-refinement of the circular polymeric N11−RNA complex crystal structure. The different N subunits of the re-refined model are shown in cartoon representation with different colors for each chain and superimposed onto the original model (PDB ID 2GTT, shown in orange). The close-up view shows an excerpt of the region that was rebuilt (in orange), with the experimental 2Fo-Fc map shown in volume representation in blue and contoured at 1σ (drawn with PyMOL).
