title: Purification of tritium-labeled cholera toxin.
abstract: Cholera toxin was labeled with tritium by the Wilzbach technique, and highly purified radiolabeled toxin was obtained by Sephadex column chromatography and disc gel electrophoresis. 3H-labeled cholera toxin retained its biological activity and chemical stability and had a specific activity of 405.9 muCi/mumol. The methods utilized in extraction and purification of 3H-labeled toxin may be advantageous for preparation of other biologically active radiolabeled proteins.
mesh_terms: D002772:Cholera Toxin / Q000302:isolation & purification* / Q000378:metabolism; D002850:Chromatography, Gel; D004591:Electrophoresis, Polyacrylamide Gel; D014316:Tritium
chemical_list: D014316:Tritium; D002772:Cholera Toxin