Plasmid R1 Incompatibility. Contribution from the cop/rep and from the par Systems

  • Kurt Nordström
  • Søren Molin
  • Helle Aagaard-Hansen


Plasmids are normally present in defined copy numbers; these can be expressed as number of plasmid molecules per cell, per protein, per chromosome equivalent, etc., but in the present paper we consequently use the baby cell as the unit. The copy number is determined by the plasmid, by the host, and by physiological conditions. Some plasmids are present in only a few (2–5) copies per cell. Nevertheless, these plasmids are completely stably inherited, loss of plasmid being a very rare event.


None None Pure Line Plasmid Copy Plasmid Replication Random Assortment 
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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • Kurt Nordström
    • 1
  • Søren Molin
    • 1
  • Helle Aagaard-Hansen
    • 1
  1. 1.Department of Molecular BiologyOdense UniversityCampusvej 55Denmark

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