IL-21DCs are blocked in their maturation. All 3 generated DC types were stimulated with (A) FITC and (B) LPS for an additional 24 hours after 8 days of culture. The percentage of positive (CD86) or high positive (CD80, MHCII) cells (fluorescence channel > 10²) with high surface density/number defined by the marker M1 is given. One representative of 2 experiments is shown.