IL-2Rγ, or Interleukin-2 receptor gamma, is a protein that plays a crucial role in the immune system. It is part of a receptor complex that binds to various cytokines, including IL-2, which is important for the growth and activation of immune cells. This receptor is found on the surface of several immune cells, such as T cells and B cells, and is essential for their proper functioning. Mutations or deficiencies in IL-2Rγ can lead to severe combined immunodeficiency (SCID), a condition where the immune system is severely weakened. This can make individuals highly susceptible to infections. Understanding IL-2Rγ is vital for developing therapies for immune-related disorders and improving immune responses in various diseases.