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. 2017 Sep 20;7:11969. doi: 10.1038/s41598-017-10583-9

Figure 1.

Figure 1

1D imino proton NMR spectrum of (a) free QDH1, (b) QDH1 bound with half the molar equivalent of netropsin, (c) QDH1 bound with equimolar ratio of netropsin, and (d) chemical structure of netropsin, a DNA minor groove-binder. G-quadruplex imino proton peaks are labelled with open circles, whereas duplex imino proton peaks of free QDH1 are labelled with filled squares. Schematic structure of netropsin (in pink) binding to the duplex stem is shown on the right.