Fig. 6.

A, tandem MS/MS spectrum of the peptide SLESGSNFAPLK from tumor necrosis factor receptor superfamily member 1A, identified as significantly “up-regulated” in the exosomes fraction. The MS signals are shown in the inset. B, tandem MS/MS spectrum of the heavy phosphorylated peptide SLEpSGSNFAPLK from tumor necrosis factor α-induced protein 3 identified as significantly “up-regulated” in the exosomes fraction. The MS signals are shown in the inset. C, tandem MSMS spectrum of the sialylated glycopeptide GNETLSR from ICAM-1. The MS signals are shown in the inset.