T cell receptors (TCRs) are proteins found on the surface of T cells, a type of white blood cell within the immune system. TCRs play a crucial role in recognizing foreign antigens, such as viruses or bacteria, and initiating an immune response to eliminate them. TCRs are highly diverse and are capable of recognizing a wide range of antigens through their unique antigen-binding sites. Research in the field of T cell receptors focuses on understanding the structure, function, and diversity of TCRs, as well as their role in immune responses and diseases such as cancer and autoimmune disorders. Recent advancements in TCR engineering and therapeutic applications, such as T cell-based immunotherapies, are also areas of active research in this field.