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Binding interaction of PapMA-3 with LPS. Saturation transfer difference (STD) NMR analysis of interaction between PapMA-3 and LPS in D2O at 298 K. (A) 1D 1H NMR spectra of 0.5 mM PapMA-3 plus 15 μM LPS (sample A), (B) STD NMR spectrum obtained on sample A at 298 K. (C) Isothermal titration calorimetry (ITC) measurement showing the binding affinity of 0.2 mM PapMA-3 to 0.025 mM LPS from E. coli O55:B5.
