Interleukin-2 receptor alpha (IL-2RA, IL-2 ra) is one of the three chains of the IL-2 receptor that is involved in IL-2 signaling. ??The soluble form of IL-2 RA in serum correlates with increased T and B cell activation and immune system activation. Studies suggest a correlation between levels of IL-2 sRA in serum the course of some leukemias and lymphomas.
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