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In physiology and synthetic biology, it can be advantageous to introduce a gene into a naive bacterial host under conditions in which all cells receive the gene and remain fully functional. This cannot be done by the usual chemical transformation and electroporation methods due to low efficiency and cell death, respectively. However, in vivo packaging of plasmids (called cosmids) that contain the...
In previous work transduction of Escherichia coli with phage λ particles carrying packaged plasmids was shown to provide complete off-to-on expression of plasmid-borne genes (Cronan, J.E., 2003. J. Bacteriol. 185, 6522–6529). The plasmids used contained the phage λcos site (and hence are cosmids) and were very efficiently packaged into λ phage particles in vivo upon induction of λ lysogens having...
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