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