TY - STD TI - Nature, [http://www.nature.com/nature/] UR - http://www.nature.com/nature/ ID - ref1 ER - TY - STD TI - Functional interaction of beta-catenin with the transcription factor LEF-1. ID - ref2 ER - TY - STD TI - The molecular constituents of intercellular junctions. ID - ref3 ER -