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2“…The synthesis of colicine K by the colicinogenic bacillus E. coli K(235) has been studied in the chemostat. …”
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4“…Partially purified colicin K (mCol K) has been obtained from cultures of Escherichia coli K235 induced with mitomycin C. …”
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15“…Using this apparatus it has been shown that the production of maximal amounts of colicine K from a strain of E. coli known as K235 is dependent upon an enriched nutrient medium which is maintained at pH 7.0.…”
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16“…By chemical fractionation a substance having colicine K activity has been obtained from the culture medium of E. coli K(235) L(+)O. …”
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17“…The colicine K-O antigen complex elicits the formation of at least two types of antibodies, one a precipitin, the other a colicine-neutralizing antibody. …”
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18“…Hemoglobin, its chains, and myoglobin enhance the antibiotic activity of colicine K. These proteins also interact with colicine K and other O antigens to alter their serological activity. …”
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19“…Colicins are plasmid-encoded toxic proteins produced by Escherichia coli strains to kill other E. coli strains that lack the corresponding immunity protein. …”
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