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Antibody levels differ distinctly between murine strains. Serum was harvested from mice (pool of two mice per strain) and was analyzed for circulating antibody isotypes by ELISA. Shown are total antibody levels (A) or antibody levels divided by isotype (B). Results from 6 wells are shown. *, P < 0.05; **, P < 0.005; ns, not significant.
