Fas (CD95)

Fas, also known as CD95, is a protein found on the surface of cells that helps regulate cell death, or apoptosis. It acts as a safety switch, signaling cells to die when they are no longer needed or could become harmful, such as in damaged or infected cells. Fas interacts with its specific partner, Fas ligand, to trigger this process. This mechanism is important for maintaining healthy tissue balance and preventing diseases like cancer or autoimmune disorders. Basically, Fas is part of the body's way to remove unwanted or dangerous cells systematically and safely.