DCs generated from CLPs in response to TLR9 ligation are functional. CLPs were sorted from CpG-injected mice and cultured under conditions designed to support B lymphopoiesis. Harvested cells were then evaluated after 8 days by flow cytometry. (A) B220+CD19−CD11c+CD11b− cells were further fractionated into pDC and NK-like IKDC populations by the NK1.1 marker, whereas B220−CD19−CD11c+CD11b+ cDCs were NK1.1−. (B) The 3 categories of DCs were sorted, and their competence to respond to CpG stimulation by production of cytokines was evaluated.