JAML (Junctional Adhesion Molecule Like) is a cell adhesion molecule that plays a key role in regulating the movement of leukocytes across epithelial and endothelial barriers. This process is essential for immune response, allowing immune cells to migrate from the bloodstream into tissues during injury or infection. JAML mediates cell-cell interactions critical for inflammation and immune surveillance, making it an important focus for understanding and treating inflammatory diseases and immune disorders.