Age matched C57BL/6J WT (circles) and TLR4-SNP (squares) mice were immunized on days 0 and 21 with NP-Ficoll (Antigen alone; open symbols, solid lines) or with NP-Ficoll + E6020 (Antigen + Adjuvant; filled symbols, dashed lines). Serum was harvested from individual mice on days 0, 4, 10, 17, 25, and 31 post-prime. NP-specific IgM (top panel) and IgG (bottom panel) titers were measured by ELISA. Data were pooled from two independent experiments with 3–5 mice/treatment group/experiment. Statistical analysis (Repeated Measures 2-Way ANOVA with Sidak’s post-hoc comparison) was performed on the log transformed data.