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MS analyses of the PTMs of Δ1-3SRCR-hLOXL2. A, glycopeptide fragment 1 (455–478) detected by mass spectrometry. B, glycopeptide fragment 2 (628–647) detected by mass spectrometry. C, ESI-MS/MS analysis of the peptide fragment containing phenylhydrazine-derivatized LTQ after tryptic digestion. The derivatized LTQ-containing cross-link, shown as an inset as the azo tautomer, is circumscribed by a green oval at the top.
