To validate the glycosylation status, we performed additional analysis before and after glycoprotein enrichment with affinity resins of ConA lectin (n = 4) using a Q Exactive MS (Thermo Scientific)
We then compared the number of identified spectra in the glycoprotein-enriched fraction, the flow-through, and the input (supplemental Table S5)
For most glycoproteins , a higher spectral count was observed in the glycoprotein-enriched fraction than in the original input and/or the flow-through
Representative examples ( fibronectin , neuronal cell adhesion molecule , tyrosine-protein-kinase-like 7 , and vWF ) are shown in Fig. 5A
Non-glycosylated proteins , such as annexin A2 and alpha-enolase , were more abundant in the flow-through
Glyco proteins identified in all three methods are highlighted in Fig. 5B