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Endotoxins are frequent contaminants of recombinant proteins produced in Escherichia coli. Due to their adverse effects, endotoxins have to be removed from recombinant proteins prior their use in cell-based assays or parenteral application. Reduction of endotoxin to less than 10 EU mg −1 is, however, one of the most problematic steps during protein purification from E. coli and often associated...
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