β-catenin peptide plays a crucial role in cellular signaling pathways, particularly in the Wnt signaling pathway, which is essential for cell proliferation, differentiation, and tissue homeostasis. In research, this peptide is widely used to study the mechanisms of cancer development, as abnormal activation of β-catenin is often linked to tumorigenesis in various cancers, including colorectal, liver, and breast cancers. It is also employed in regenerative medicine to investigate tissue repair and stem cell regulation, as β-catenin is involved in the maintenance and differentiation of stem cells. Additionally, it serves as a tool in drug discovery to identify and test potential therapeutic agents targeting Wnt/β-catenin signaling for treating diseases like cancer and degenerative disorders. Its applications extend to developmental biology, where it helps understand embryogenesis and organ formation.