CD25 is crucial for the proper functioning of the immune system. It binds to interleukin-2 (IL-2), a cytokine that promotes the growth, differentiation, and survival of T cells. By forming a high-affinity IL-2 receptor complex with CD122 (IL-2Rβ) and CD132 (common gamma chain), CD25 enables the effective transmission of IL-2 signals, which are vital for the immune response.
