TLR2, or Toll-like receptor 2, is a protein that plays a crucial role in the immune system. It is part of a family of receptors that help the body recognize pathogens, such as bacteria and viruses. When TLR2 detects these harmful invaders, it triggers an immune response, helping to protect the body from infections. TLR2 is primarily found on the surface of immune cells, including macrophages and dendritic cells. By recognizing specific components of pathogens, TLR2 activates signaling pathways that lead to the production of inflammatory cytokines. This process enhances the immune response and helps the body fight off infections more effectively.