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. Author manuscript; available in PMC: 2011 Dec 1.

Published in final edited form as: Anal Chem. 2010 Nov 4;82(23):9654–9662. doi: 10.1021/ac101856r

(a) Negative ion mode MALDI FT ICR MS spectrum of b-LF glycopeptides after 24 hrs immobilized pronase digestion. (b) Positive ion mode MS spectrum of the same b-LF glycopeptide sample. Inverted triangles () represent potential glycopeptide peaks labeled based on the GP finder analysis of the spectrum mass list, and circles () indicate dissociated glycan peaks.

Inline graphic — (a) Negative ion mode MALDI FT ICR MS spectrum of b-LF glycopeptides after 24 hrs immobilized pronase digestion. (b) Positive ion mode MS spectrum of the same b-LF glycopeptide sample. Inverted triangles () represent potential glycopeptide peaks labeled based on the GP finder analysis of the spectrum mass list, and circles () indicate dissociated glycan peaks.