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B factors and r.m.s.d. per residue for the RNA-binding domain of nonstructural protein 1 of influenza A virus. (a) B factors of the PDB structure (1ail; dotted line) and the three alternative models (solid line). (b) All-atom and (c) backbone r.m.s.d. for each residue of the alternative models compared with the SAR PDB structure.
