The DNA between Rz and cosR in bacteriophage lambda is nonessential. Academic Article uri icon


  • Near the right end of phage lambda DNA, between gene Rz and the cos site, are 2050 bp of apparently non-coding DNA. We have cloned a lambda DNA fragment containing this DNA into a plasmid and constructed a deletion, omega l, extending from a site within the Rz gene to a site about 560 bp from cos. This deletion could be recombined into viable lambda phage at a frequency equal to that observed for the undeleted sequence. Recombinant phage lambda carrying the omega l deletion were demonstrated to have the same burst size and kinetics of phage production as undeleted lambda. The omega l deletion can be used to extend the capacity of lambda cloning vectors and to provide a region for the insertion of heterologous DNA which should exhibit controllable high level expression from the lambda late promoter, p'R.

published proceedings

  • Gene

author list (cited authors)

  • Hernandez, V. J., Edlind, T. D., Young, R. F., & Ihler, G. M.

citation count

  • 4

complete list of authors

  • Hernandez, VJ||Edlind, TD||Young, RF||Ihler, GM

publication date

  • January 1985

published in