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. 2012 Jun 25;287(33):27851–27862. doi: 10.1074/jbc.M112.376525

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© 2012 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 7. — Glycan structural characterization by mass spectrometry. Tandem mass spectrum of singly charged ion at m/z 377 following feCID of intact flagellin protein showed consecutive losses of water and an acetyl group from the parent ion giving rise to an ion at m/z 317. Subsequent losses from this ion gave rise to a fragmentation pattern similar to that observed with nonulosonic acid sugars. Daughters ions marked with an asterisk denote those fragment ions found in MS/MS spectra of pseudaminic acid. , 376-Da sugar; *, fragment ions common to pseudaminic acid; Ac, acetyl group.

Inline graphic — Glycan structural characterization by mass spectrometry. Tandem mass spectrum of singly charged ion at m/z 377 following feCID of intact flagellin protein showed consecutive losses of water and an acetyl group from the parent ion giving rise to an ion at m/z 317. Subsequent losses from this ion gave rise to a fragmentation pattern similar to that observed with nonulosonic acid sugars. Daughters ions marked with an asterisk denote those fragment ions found in MS/MS spectra of pseudaminic acid. , 376-Da sugar; *, fragment ions common to pseudaminic acid; Ac, acetyl group.