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Introduction of wbdR into B. abortus leads to the expression of N-acetyl-perosamine in the O-PS. 1H NMR spectrum (Top) and selected 13C NMR spectral regions corresponding to carbonyl region (Lower Left) and region for C4 resonances (Lower Right) of N-formylated and N-acylated perosamine in strain Ba-pwbdR.
