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Levels of IgG, IgG1, and IgG2a anti-STAg (A) or anti-Tx1+Tx2 (B) determined by ELISA in serum samples from C57BL/6 mice immunized with STAg, BSA or Tx1+Tx2. It was observed that animals immunized with STAg recognized only STAg and animals immunized with Tx1+Tx2 only recognized Tx1+Tx2.
