T-cell receptors

T cell receptors (TCRs) are specialized proteins found on the surface of T cells, a type of immune cell. They play a crucial role in the immune system by recognizing and binding to specific pieces of foreign substances, called antigens, that are presented by other cells. This recognition triggers T cells to activate and respond, either by killing infected cells or helping other immune cells. Each T cell has a unique TCR, allowing the immune system to target a wide variety of pathogens, such as viruses and bacteria, effectively protecting the body from infections.