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. 2016 Jul 14;6:29776. doi: 10.1038/srep29776

Figure 4.

Figure 4

MALDI-TOF spectra of 5 pmol tryptic digests of asialofetuin (a) without any pretreatment, (b) deglycosylated by PNGase F, (c) enriched by ZICF-PAMAM and deglycosylated by PNGase F, (d) enriched by commercial Zic-HILIC materials and deglycosylated by PNGase F. (The asterisk denotes the deglycosylated glycopeptides. The pound sign denotes the doubly charged species).