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. 2005 Feb;11(2):197–209. doi: 10.1261/rna.7149605

FIGURE 6.

FIGURE 6.

Interactions between the 15.5K protein and the external loop. (A) Asn40 and Lys44 of the 15.5K protein establish a bridge between G43 and the sugar-phosphate backbone of the external loop of the 5′ stem–loop of U4snRNA. (B) Bridging distance between the O6 atom of G43 and the O2P atom of C41 for the unbound K2 RNA (black curve) and for the bound K2 (red curve), K3 (green curve), and K4 (blue curve) and K5 (brown curve) RNAs during the MD-LES trajectories; the bridge is shown in A. (C) B-factors per residue for the nucleotides of the external loop for the unbound K2 RNA (black curve) and for the bound K2 (red curve), K3 (green curve), and K4 (blue curve) RNAs during the MD-LES trajectories. (D) Asn64 and Lys68 of the ribosomal L7AE protein establish a similar bridge between G43 and the sugar-phosphate backbone of the Kt15 RNA.