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Purification by high performance liquid chromatography of Clostridium perfringens type a enterotoxin prepared from high toxin producers selected by a toxin-antitoxin halo

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Abstract

High enterotoxin-producing substrains of Clostridium perfringens type A were selected reproducibly as colonies having toxin-antitoxin haloes on agar plates of Duncan-Strong medium containing antitoxin serum. Enterotoxin from these sub strains was subjected to rapid purification by high performance liquid chromatography (HPLC). For this, the toxin was extracted by sonication from sporulating bacteria grown in Duncan-Strong sporulation medium, fractionated by ammonium sulfate (40% saturation) precipitation and differential solubilization and then purified by HPLC: gel permeation chromatography through a G2000SW column and ion-exchange chromatography on a Mono Q column. Purified toxin preparations had a similar specific activity (4.2 x 102 mouse MLD/mg protein) and homogeneity on polyacrylamide gel-electrophoresis to preparations obtained by conventional gel permeation through a Sephadex-G200 column. By further HPLC on a Mono Q column, minor nontoxin proteins were separated from the toxin without loss of the toxicity on a protein basis. The final yield of the purified toxin was about 15° of that in the bacterial extract. The two HPLC procedures each took only one hour.

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Sugimoto, N., Ozutsumi, K. & Matsuda, M. Purification by high performance liquid chromatography of Clostridium perfringens type a enterotoxin prepared from high toxin producers selected by a toxin-antitoxin halo. Eur J Epidemiol 1, 131–138 (1985). https://doi.org/10.1007/BF00141806

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