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1H NMR spectra of de-O-acetylated serotype 11A (MNZ2293-A), 11Av (MNZ2293-C), and 11E (MNZ264) capsule PSs, which are indistinguishable. #, NMR signals arising from residual water; *, NMR signals arising from residual Tris-HCl from buffer; PC, NMR signals arising from phosphocholine residues on contaminating teichoic acid.
