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With the development of matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI), molecular interrogation of tissue sections over a wide mass range has become feasible, but small molecule analysis is still far from being fully reached due to the limited sensitivity and matrix interference. Herein, graphene oxide (GO) is used as a MALDI matrix to image small molecules in tissues...
Sialylation is essential for a variety of cellular functions. Herein, we used bovine fetuin with three potential N-linked glycosylation sites containing complex-type glycan structures, four potential O-linked glycosylation sites and six potential phosphorylation sites as a model compound to develop a highly-efficient digestion strategy for sialylated glycoproteins and efficient enrichment strategy...
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