IL-3 induces expression of NKp44 in peripheral blood IPCs. (Top) IPCs isolated from peripheral blood were stained with mAbs against BDCA-2 and NKp44 before (left) and after (right) overnight culture in IL-3. (Bottom) Total PBMCs were cultured overnight in the absence (left) or presence (right) of IL-3 and analyzed for expression of BDCA-2 and NKp44.