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. 2010 Oct 22;39(4):1398–1407. doi: 10.1093/nar/gkq988

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© The Author(s) 2010. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 4. — MS/MS analysis of a peptide consisting of amino acid residues E129-R135 of χ cross-linked to SSB-Carb. Parent mass of 2248.98 was analysed by MALDI TOF/TOF. MS/MS spectra revealed sophisticated fragments of both peptides. MS/MS spectra are shown in the m/z range from 10 to 1100. Larger fragments could not be assigned to the modified peptide. All fragments assigned to y-, b- and b-17 ions are indicated by their m/z values. (A) Fragments originating from the E129–R135 peptide of the χ protein are indicated. (B) Fragments generated from the SSB-Carb peptide are labelled.