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To facilitate the use of the new mutant resource developed in the mouse, we have generated Cre and FlpO deleter mice on a pure inbred C57BL/6N background (Birling et al., 2012).

The new transgenic constructs were designed to drive either the Cre or the FlpO recombinases, fused to a specific fluorescent marker (respectively the eGFP or the eYFP) and were inserted in the neutral Rosa26 locus.

IngGen_Cre and Flp deleter lines


They allow a rapid, cost-effective and efficient identification of the carrier individuals through the co-expression of the fluorescent marker. The main advantages of these deleters are:

  • Preservation of a pure genetic background when used to remove specific selection cassette or to induce complete loss-of-function allele (pure inbred C57BL/6N background)
  • Insertion in the Rosa26 locus
  • Simplicity of genotype identification (fluorescence evaluation)
  • High and stable recombination efficiency (up to 100%)
  • Expression of Cre and FlpO in developing oocytes respectively of the transmission of the Cre and FlpO transgenes


For more information about our Cre systems, please visit our Mouse Cre and CreERT2 zoo dedicated pages or contact us directly by email.



Users publications:

Complete listing on the Mouse CreERT2 zoo dedicated pages