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Mass spectra of purified flagellin preparations. A, B. cenocepacia flagellin. B, chemically deglycosylated flagellin. C, nonglycosylated flagellin purified from the ΔBCAL0111 mutant strain. D, flagellin purified from strain MH43 (ΔwbxD). Arrows indicate the difference of 231 m/z between ions.
