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Conformational changes in Ψ55S and RNA. (A) Cα superposition of apo-Ψ55S (blue) with the one in Ψ55S-RNA complex (red). The Ins2 of both structures are highlighted with RIBBONS representations. RNAs are colored as in Figure 2B. (B) Three-dimensional superposition of the RNA in Ψ55S-RNA complex (green) with the corresponding nucleotides of tRNAPhe (red). Only the C1′ and P atoms of RNA (excluding nucleotides 55–57) were applied for the alignment.
