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(A) Non-canonical G4 sequences. Guanine bases involved in the formation of RNA G4 structures are marked blue. (B) Dependence of CyT (2 μM) fluorescence intensity on noncanonical G4 sequences and nonG4 sequences (4 μM in 20 mM Tris-HCl, pH 7.0, 40 mM K+).
