Abstract:
:The Cre-lox system is an important tool for genetic manipulation. To promote integrative reactions, two strategies using mutant lox sites have been developed. One is the left element/right element (LE/RE)-mutant strategy and the other is the cassette exchange strategy using heterospecific lox sites such as lox511 or lox2272. We compared the recombination efficiencies using these mutant lox sites in embryonic stem (ES) cells, and found that the combination of the LE/RE mutant and lox2272 showed high recombination efficiency and stability of the recombined structure. Taking advantage of this stability, we successfully integrated the cre gene into the mutant lox sites by Cre-mediated recombination. Germ line chimeric mice were produced from the cre-integrated ES cell clones, and Cre-expressing mouse lines were established. The inserted cre gene was stably maintained through the generations. This cre knock-in system using the LE/RE-lox2272 combination should be useful for the production of various cre mice for gene targeting or gene trapping.
journal_name
Nucleic Acids Resjournal_title
Nucleic acids researchauthors
Araki K,Araki M,Yamamura Kdoi
10.1093/nar/gnf102keywords:
subject
Has Abstractpub_date
2002-10-01 00:00:00pages
e103issue
19eissn
0305-1048issn
1362-4962journal_volume
30pub_type
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