A, Representative contour plots of CD44 versus tetramer for CD4+ events from total spleen and lymph node cells from naive B6 mice (top row) or B6 mice injected i.v. with 50 µg of the indicated peptide plus 5 µg LPS (bottom row) following enrichment with the indicated tetramers. B, Total numbers of tetramer+, CD4+ or CD8+ cells following tetramer enrichment of total spleen and lymph node cells from a naive B6 mouse or tetramer+, CD4+ cells from OT-II RAG1−/−, TEa RAG1−/−, or SM1 RAG1−/− TCR transgenic mice. Symbols represent individual mice; horizontal bars indicate mean values. C, Mean total number (±S.D., n=2–8) of 2W1S:I-Ab+ (circles), FliC:I-Ab+ (triangles), or OVA:I-Ab+ (diamonds) cells in B6 mice over time following i.v. injection with 50 µg of the relevant peptide plus 5 µg LPS. D, Mean total number (±S.D., n=3) of 2W1S:I-Ab+ (circles), FliC:I-Ab+ (triangles), or OVA:I-Ab+ (diamonds) cells in B6 mice 4 days following i.v. injection with 5 µg LPS plus the indicated amount of relevant peptide.