
Site-specific structural characterization of O-glycosylation and identification of phosphorylation sites of recombinant osteopontin
Keywords: OPN; osteopontin; PTM; post-translational modification; O-GlcNAc; O-linked β-N-acetylglucosamine; MALDI-TOF; matrix-assisted laser desorption ionization-time of flight; MS; mass spectrometry; PMF; peptide mass fingerprint; MS/MS; tandem mass spectrometry