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Absence of xylose in the ocfC mutant product. (A) Region of the TOCSY spectrum showing the proton chemical shifts of xylose in the wild-type sample; (B) region of the TOCSY spectrum showing the absence of the xylose in the ocfC mutant product sample; (C) MALDI-TOF MS spectrum of the ocfC mutant product showing a base mass of 1,068 Da, which is a loss of 132 Da compared to the wild-type product mass.
