Flow cytometric analysis of peripheral blood lymphocytes of a patient treated with daclizumab.

The dot plots in the first two columns are gated on lymphocytes, and those in the third and fourth columns are gated on CD3⁺cells. Following treatment, p55 is not detected by anti-CD25 nor by anti-humanized Tac (daclizumab) on CD3⁺ cells (first and second columns), but the CD3⁺ cells remain positive for HLA-DR (third column) and faintly positive for p55 using 7G7 (fourth column).