Skip to main content
. Author manuscript; available in PMC: 2017 Sep 25.
Published in final edited form as: J Am Soc Mass Spectrom. 2017 Jan 3;28(5):818–826. doi: 10.1007/s13361-016-1565-z

Figure 7.

Figure 7

Analysis of peptides for detecting deamidation by LCMS with the QTrap 4000. For the three peptides that have deamidation sites, there are peaks corresponding to the unmodified form, the n-Asp form, and the isoAsp form of the asparagine residue in red. The unmodified form of each peptide elutes first, followed by the n-Asp form, and finally the isoAsp form. The first two deamidated peptides differ at the 8th position, where the first peptide has a leucine and the second peptide has a valine