IL2RA and neoplasm: Western blots of the tumor tissue showed that CD25 protein level was not different between small (0.10-0.45 g; relative CD25 band density, 100.0 ± 26.4%), moderate (0.45-0.93 g; 71.7 ± 9.4%), and large tumors (1.00-3.00 g; 98.7 ± 54.7%; Figure 3B).