CD3 molecule

CD3 is a group of proteins found on the surface of T-cells, which are a type of white blood cell crucial for the immune system. It acts as a signaling complex that helps T-cells recognize and respond to infected or abnormal cells in the body. When a T-cell encounters a threat, CD3 transmits signals inside the cell to activate it, prompting an immune response. This makes CD3 essential for the proper functioning of the immune system and a target for certain immunotherapies and diagnostic tests.