{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"The IL-2 receptor, a Type I transmembrane protein, has three forms, generated by combination of 3 distinct subunits, namely the alpha (CD25), beta (CD122), and gamma (CD132) chains. IL-2 binds CD25 with low affinity, but binds with high affinity to the heterotrimeric form consisting of CD25, CD122, and CD132. CD25 is present on activated T-cells, activated B-cells, some thymocytes, myeloid precursors, and oligodendrocytes."}]}]}