Abstract
Egg white lysozyme was found to catalyze the transfer of N-acetylglucosamine to cyclo[-->6)-alpha-D-Glcp-(1-->3)-alpha-D-Glcp-(1-->6)-alpha-D-Glcp-(1-->3)-alpha-D-Glcp-(1-->] (CTS). Structural analysis showed that the transfer product was 3-O-beta-N-acetylglucosaminyl CTS, cyclo[-->6)-alpha-D-Glcp-(1-->3)-alpha-D-Glcp-(1-->6)-[beta-GlcNAc-(1-->3)]-alpha-D-Glcp-(1-->3)-alpha-D-Glcp-(1-->]. This branched saccharide is anticipated to be a model compound of the sugar chains of glycoproteins.
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