A Lysin(s) in Lysates of <i>Clostridium botulinum</i> A190 Induced by Ultraviolet Ray or Mitomycin C

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  • MITSUI Noriko
    Department of Bacteriology, School of Medicine, Kanazawa University
  • KIRITANI Kazuyoshi
    Department of Bacteriology, School of Medicine, Kanazawa University
  • NISHIDA Shoki
    Department of Bacteriology, School of Medicine, Kanazawa University

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  • A lysin(s) in lysates of Clostridium botulinum A190 induced by ultraviolet ray or mitomycin C

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When cells of the Clostridium botulinum A190 strain were subjected to treatment with mitomvcin C or to irradiation with ultraviolet ray and then grown at 37C, an induced lytic agent(s) was produced in the resultant lysate. Production of the lytic agent in the induced bacterial culture was inhibited in the presence of chloramphenicol. A crude preparation of the phage-free lytic agent readily lysed freezethawed or acetone-treated cells of C. botulinum B-NIH19, and heated or chloroform-treated cells to a lesser extent at the optimal pH of 6.8. The lytic agent was stable at or below 37C, but unstable above 37C. A crude preparation of the lytic agent did not exhibit a detectable effect on the viability of vegetative cells.

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