Figure 6. Pbx1-d Tg expression in CD4+ T cells increased affinity maturation of TH1-related isotypes.
B6 and Pbx1-d Tg mice were immunized with NP-KLH then boosted 2 and 6 weeks later (arrows on X axes). Serum levels of NP-specific Abs 1 wk before and after boosting measured in plates coated with NP4 (A) or NP25 (B) BSA. C. Affinity measured as the NP4 / NP25 ratio for each isotype, n = 5.
