(A) Wild-type and IRAK2-deficient BM-derived macrophages were treated with LPS (1 μg/ml), R848 (1 μg/ml) or CpG B (1 μg/ml) for the indicated times. Cell lysates were analyzed by the Western method with antibodies against IRAK2, phospho-IKBα, IKBα, phospho-ERK, phospho-p38, and actin. (B) Wild-type or IRAK2-deficient BM-derived macrophages were treated with R848 (1 μg/ml) or CpG B (1 μg/ml) for 2 h. A heat map is shown for some genes from Illumina microarray analyses that were induced less by R848 but more by CpG in IRAK2-deficient macrophages. (C) Real-time PCR analysis of selected genes from microarray analysis. Wild-type and IRAK2-deficient BM-derived macrophages were treated with R848 or CpG B for the indicated times or were untreated. (* p< 0.05).