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Oxidative mass shift modifications and body systems identified by IV-FPOP. (a) Oxidative mass shift modifications observed by HCD-MS/MS fragmentation (top) and body systems (bottom) identified by IV-FPOP label-free MS. (b) Oxidative mass shift modifications observed by CID-MS/MS fragmentation (top) and body systems (bottom) identified IV-FPOP-cPILOT.
