Production of IL-6 and IL-12 by dendritic cells pulsed with Id-KLH or Id/GM-CSF. Bone marrow-derived dendritic cells were pulsed with antigen with and without CpG ODN for 18 hours. Production of IL-12 and IL-6 was determined by ELISA. (▨) CpG ODN; (▪) no CpG ODN.