Glycosyltransferases and glycosidases are responsible for the assembly, processing, and turnover of glycans. In addition, there are a number of transferases that modify glycans by the addition of acetyl, methyl, phosphate, sulfate, and other groups. This chapter covers the general characteristics of enzymes involved in glycan initiation, assembly, and processing, including aspects of substrate specificity, primary sequence relationships, structures, and enzyme mechanisms.
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