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Figure 3.
Fig. 3. Stereo diagram of the TAR RNA 3-nt bulge region
showing the direct and indirect ligands of Ca1, Ca2, and Ca3.
Water molecules are colored cyan. Solid yellow bonds denote
inner-sphere ligand interactions with the RNA, and black dashed
bonds represent outer-sphere coordination. Additional water
molecules binding in the bulge region have been omitted for
clarity.
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