University of Edinburgh Feb 2 2026 Scientists have created a complete map showing how hundreds of possible mutations in a key cancer gene influence tumor growth. The study focused on CTNNB1, a gene that produces the protein β-catenin, which helps regulate tissue growth and repair. When β-catenin is disrupted, cells can begin uncontrolled growth – a hallmark of cancer. By systematically testing all possible mutations in a priority area of the gene in mouse cells, the map helps explain why