Cholera toxin B subunit, from vibrio cholerae

Cholera toxin B subunit, from vibrio cholerae (CTB, from vibrio cholerae) is non-toxic to cells and possesses no intrinsic adenylate cyclase activity. Cholera toxin B subunit, from vibrio cholerae attaches to cells by binding to ganglioside GM1.8 CTB has been shown to be a good label for microglial cells (due to the enrichment of ganglioside GM1 on their cell surface), but not for oligodendrocytes or astrocytes. Cholera toxin B subunit, from vibrio cholerae has been reported to be an excellent tracer for the study of axonal transport using immunohistochemical methods. Cholera toxin B subunit, from vibrio cholerae has been widely used as a marker of membrane lipid rafts[1].