We have analyzed the structures of the glycans on immunoprecipitated proteins from small amounts of cell or tissue lysates, by liquid-chromatography electrospray mass spectrometry (LC-ESI-MS) and MS/MS. The sensitive and specific method was applied to the analysis of the O-glycosylation of MUC1 in breast, prostate and gastric cancer, including analysis of a patient tumor specimen. The method will be applicable for the glycosylation analysis of individual proteins.
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Bäckström et al. (2008) studied this question.
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