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Fluorescence emission spectra of 0.5 μM 9CI with the addition of 0.5 μM c-MYC Pu22 DNA G-quadruplex oligonucleotide and the mutant oligonucleotides, λex = 405 nm. Fluorescence emission of 9CI alone is shown in black, and 0.5 μM oligonucleotides were prepared in 10 mM K2HPO4/KH2PO4, 100 mM KCl, pH 7.0.
