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(A) Total ion chromatogram (TIC) for a 600 minute gradient LC-MS/MS acquisition at a flow rate of 5 nL/min. (B-E) Representative extracted ion chromatograms (XIC) for peptides detected throughout the gradient: (B) IFAPNHVVAK; (C) LVGEIMQETGTR; (D) LNVDFALIHK; and (E) AEYLASIFGTEK.