Figure 7
MALDI-TOF mass analysis of tryptic digest of HRP (50 fmol·μL−1): (a) before enrichment, (b) eluent and (c) supernatant after enrichment with Fe3O4-GO@PDA-Chitosan nanocomposites; eluent after enrichment with (d) Fe3O4-GO@PDA nanocomposites. The peaks of glycopeptides are marked with 
.
