To delete genes specifically from mammary tissue using the Cre-lox system, we have established transgenic mice expressing Cre recombinase under control of the WAP gene promoter and the MMTV LTR. Cre a
Adaptation of the P1 phage-derived Cre /loxP site- specific recombination system to the gene targeting technique allows for the conditional deletion of genes in mice. To selectively modify genes in B
