Snapshot of the Rclick showing the first alignment of two RNA aptamer structures, PDB codes 1OOA:D (salmon), and 2JWV:A (green). The superimposed residues of 1OOA:D and 2JWV:A are shown in red and blue,respectively. The regions, spanning residues 1-8 and 21-29 are aligned with one another. Because of a conformational change, the regions of residues 10-20 do not align structurally.
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