This chapter surveys techniques for structural characterization of glycans, including composition, linkage, and attachment to aglycones. It covers detection of specific glycan sequences on glycoproteins and cellular surfaces and methods for characterizing structures in three dimensions. The techniques described range from classical chemical detection and characterization of isolated glycan products to sensitive fluorescence methods used in combination with glycan-binding proteins and microscopy on cells and tissues. In addition, nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS), approaches that allow more detailed structural characterization, are discussed.
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