Figure 5: CD25 is reduced on non-regulatory T cells yet spared on regulatory T cells in the presence of costimulation blockade. CD25 and CD62L was assessed on CD3+CD4+ FoxP3- and FoxP3+ cells from (A) freshly isolated cells (B) following 1 day of culture or (C) 3 days of culture under the conditions indications. Shown are results from one of 4 independent experiments.