Highly Purified Colicin E3 Contains Immunity Protein

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RESUMO

Colicin E3, even when highly purified, still contains about one molar equivalent of a second protein, “E3 immunity protein.” The two proteins are bound together in a complex that can be dissociated only under strongly denaturing conditions, such as electrophoresis in sodium dodecyl sulfate-polyacrylamide gles or by gel filtration in 6 M guanidine·hydrochloride.

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