PURIFICATION OF A PROTEIN TOXIN FROM CORYNEBACTERIUM ULCERANS

Abstract
Toxin from C. ulcerans strain 378 was purified 66-fold by ammonium sulfate fractionation, dialysis, gel filtration on Ultrogel AcA22, ion-exchange chromatography on DEAE-cellulose and gel filtration on AcA54. On polyacrylamide-gel electrophoresis, the purified material was homogeneous, staining for protein, but not carbohydrate or lipid. The MW of C. ulcerans toxin was 13,000 as determined by SDS(sodium dodecyl sulfate)-polyacrylamide-gel electrophoresis and 15,000 as determined by gel filtration on AcA54.

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