CAPS (Calcium-Activated Protease Substrate): CAPS is a protein that serves as a substrate for calcium-activated proteases, playing a crucial role in cellular processes regulated by intracellular calcium levels. It is involved in cell migration, division, and apoptosis—key functions for tissue development and repair. CAPS helps regulate cytoskeletal dynamics and cell adhesion, which are essential for maintaining cell structure and function. Its regulation through calcium signalling emphasises its role in cellular homeostasis and responses to physiological and pathological conditions. Dysregulation of CAPS may contribute to various disease states.