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Normal Ab responses to TI type 2 antigen in Tg mice. WT (□) and Tg (○) mice were immunized i.p. with 10 μg of TNP-Ficoll. Sera were collected at the indicated dates, diluted 500-fold, and TNP-specific IgM (A) and IgG3 (B) were measured by ELISA. Results are expressed as the average optical density ± SD from three mice per group.
