All Red/ET Recombination Kits come with tailored control experiments and harbor the same Red/ET proficiency plasmid.

Red/ET Recombination Strains

Selection Cassettes

Also available are accessory selection cassettes designed for use in Eukaryotes or Prokaryotes, some flanked by loxP- or FRT-sites. These sites will allow the subsequent removal of the selection marker by a Cre- or FLP-recombinase step if required. These cassettes may be very helpful for generating targeting constructs in mammals, or for introducing sequences without leaving a selection marker behind.

Expression Plasmids

The following recombinase expression plasmids are very useful to excise FRT- or loxP-flanked DNA stretches （such as selection markers） during a modification task. The plasmids are easily transformed into cells resulting in an activation of the recombinases in vivo.