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S Normark, T Edlund, T Grundström… - Journal of …, 1977 - Am Soc Microbiol

Escherichia coli K-12 Mutants Hyperproducing Chromosomal Beta-Lactamase by Gene Repetitions.

k-12

[No authors listed]

GSID: MeZWtL8iYE0J

Excerpt

… Escherichia coli K-12 ampicillin-resistant mutants hyperproducing chromosomal /3-lactamase … Ampicillin-resistant mutants of E.coli K-12 can be isolated at a low incidence. The first … coli K-12 strains used are listed in Table 1. recA derivatives of various strains were obtained in …

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