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Evidence for a dual control of the initiation of host-cell lysis caused by phage lambda

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The timing of host-cell lysis by coliphage λ is controlled by two separable systems. The λS gene product acts as a positive effector of lysis while another protein, the lysis regulator, is an inhibitor of lysis. It the continuous function of the lysis regulator is interrupted in phage infected cells immediate lysis ensues. This lysis requires metabolic energy but not S gene activity. In contrast, S protein activity is stimulated by agents which uncouple and which block oxidative phosphorylation. The lysis regulator is thermolabile and several lines of evidence suggest that it may be the λrex gene product.

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Communicated by R. Devoret

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Campbell, J.H., Rolfe, B.G. Evidence for a dual control of the initiation of host-cell lysis caused by phage lambda. Molec. Gen. Genet. 139, 1–8 (1975). https://doi.org/10.1007/BF00267990

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  • Continuous Function
  • Gene Product
  • Metabolic Energy
  • Infected Cell
  • Gene Activity