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We have investigated the regulation mechanism of the surface sialyl-Le X (sLe X ) expression level in tonsillar B cells during activation. sLe X antigen became strongly positive after activation, while resting B cells were weakly positive. sLe X structures were mainly located on O-linked oligosaccharide chains of glycoprotein. Transcripts of FucT-VII and core 2 GlcNAc...
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