After human genomics was completed in 2003, interact of life scientists haves been shifted to proteomics including functional analysis of human proteins. In this respect, chemically modified carbohydrates, or carbohydrate derivatives, are recognized as powerful tools to investigate functions of carbohydrate-related proteins, such as lectins, glycosyltransferases, and glycosidases. In addition, the carbohydrate derivatives are of quite importance as substrates to develop various carbohydrate-based drugs, since various carbohydrate-protein interactions act as main driving forces to induce virus infections, cancer metastases, inflammations, etc. So, Cehemieally modified carbohydrate derivatives have, therefore, attracted great interests from researchers of wide scientific fields.
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