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Reichelt, Peter; Schwarz, Christoph; Donzeau, Mariel
Protein expression and purification, 04/2006, Letnik: 46, Številka: 2Journal Article
Endotoxin is an unwanted by product of recombinant proteins purified from Escherichia coli. The inherent toxicity of endotoxins makes their removal an important step for the proteins’ application in several biological assays and for safe parenteral administration. The method described in this paper is a one-step protocol which is effective at removing tightly bound endotoxin from over-expressed tagged proteins in E. coli. We combined affinity chromatography with a non-ionic detergent washing step, to remove most of the endotoxin contaminants from the end product. An endotoxin reduction of less than 4 to 0.2 EU mg −1 was achieved with protein recovery close to a yield 100%. As this new protocol requires only one step to simultaneously purify tagged proteins and eliminate endotoxins, it represents a substantial advantage in time, effort, and expense.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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