The BtuB group col plasmids and homology between the colicins they encode.

@article{Mock1982TheBG,
  title={The BtuB group col plasmids and homology between the colicins they encode.},
  author={Mich{\`e}le E. Mock and Anthony P. Pugsley},
  journal={Journal of bacteriology},
  year={1982},
  volume={150 3},
  pages={1069-76}
}
Colicins A, E1, E2, E3, E4, E5, E6, and E7 exhibited reduced activity against BtuB mutants of Escherichia coli K-12 and also against wild-type cells in the presence of vitamin B12. Plasmids encoding representatives of these colicins were specifically immune to high levels of the homologous colicin. Col(+) cells grown in media containing mitomycin C accumulated large amounts of colicin polypeptide. ColE2(+), ColE3(+), ColE4(+), ColE5(+), and ColE6(+) cultures also synthesized large amounts of… CONTINUE READING
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