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. Author manuscript; available in PMC: 2011 Apr 6.
Published in final edited form as: Biochemistry. 2010 Apr 6;49(13):2943–2951. doi: 10.1021/bi100106c

Figure 2.

Figure 2

(A) Structures of 2-aminopurine (P), 7-deazaguanine (Z), and 7-deazaadenine (X). Sequences and secondary structures of (B) the theophylline-binding aptamer RNA constructs with 2AP (P) labeled at residue 27; (C) the theophylline-binding aptamer RNA constructs with 2AP labeled at residue 10; and (D) 3MX-binding aptamer RNA constructs with 2AP at residues 27 and 10.