References
In the presence of wnt signals (+wnt) the cytosolic amount of b-catenin increases and thus translocates to the nucleus where it associates with transcription factors of the TCF/ LEF family. Due to its transactivating ability the b-catenin-transcription-factor-co mplex binds to DNA and activates wnt target genes.
http://www.gene-regulation.com/info/b-catenin.html