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WztO9a-C binds to the terminal methylphosphate group of the O9a polysaccharide. A, time dependence of magnetization transfer (STDD%) of the terminal methylphosphate methyl protons for four saturation time points. B, 1H NMR spectra of off-resonance (top) and STDD (bottom) experiments after 3-s saturation. Panels to the right display the region between 3.60 and 3.66 ppm.
