Expression of CD25 (p55 IL-2R, BB10 MoAb), CD122 (p75 IL-2R, Mik-β1 MoAb), and TUGh4 MoAbs (p64 IL-2R) in 2 representative LDGL patients (cases no. 3 and 10). (A and B) Cells cultured in medium alone; the same pattern of expression was shown by freshly isolated patients' GL. (C and D) Cells cultured with IL-2 (10 ng/mL) for 72 hours; (E and F ) cells cultured with IL-15 (10 ng/mL) for 72 hours; (G and H) cells cultured in the presence of both cytokines for 72 hours.