期刊
NUCLEIC ACIDS RESEARCH
卷 30, 期 14, 页码 3067-3077出版社
OXFORD UNIV PRESS
DOI: 10.1093/nar/gkf421
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资金
- NHLBI NIH HHS [HL50560, R37 HL050560, R01 HL050560] Funding Source: Medline
The ability of the Cre/lox system to make precise genomic modifications is a tremendous accomplishment. However, recombination between cis-linked heterospecific lox sites limits the use of Cre-mediated exchange of DNA to systems where genetic selection can be applied. To circumvent this problem we carried out a genetic screen designed to identify novel mutant spacer-containing lox sites displaying enhanced incompatibility with the canonical loxP site. One of the mutant sites recovered appears to be completely stable in HEK293 cells constitutively expressing Cre recombinase and supports recombinase-mediated cassette exchange (RMCE) in bacteria and mammalian cell culture. By preventing undesirable recombination, these novel lox sites could improve the efficiency of in vivo gene transfer.
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