Serologic response to different peptide conjugates or peptide alone with QS21.

Mice were vaccinated with the indicated conjugates or KLH only. Serum samples from the mice were tested in an ELISA against the indicated antigens at a 1:200 dilution as described in “Materials and methods.” This peptide specificity experiment was repeated 5 times with 5 mice in each group. Open circles represent value for each individual mouse. Standard deviations of the mean are shown.