Tg(BAT-lacZ)3Picc

Mice with this transgene express nuclear beta-galactosidase under control of the beta-catenin-activated transgene (BAT) promoter. This promoter consists of a DNA fragment extending 0.13 kb upstream from the translation start site of the novel protein containing homeodomain (siamois) gene of Xenopus laevis, which contains the (beta-catenin non-responsive) minimal promoter of this natively beta-catenin activated gene, downstream of seven synthetic lymphoid enhancer factor/T-cell factor- (LEF/TCF-) binding sites that effectively restore the promoter's beta-catenin responsiveness. The transgene does not segregate randomly with respect to the Jup locus indicating that the transgene insertion site is genetically linked to Jup. (J:82727)