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CTL responses demonstrated with cultured lymphocytes from HIV-infected chimpanzee (A) and human (B) subjects. CTL cultures restimulated with Vac-HIVgag were tested against autologous BLCL pulsed with N-terminal, C-terminal, or complete HIV Gag peptide pools or mock pulsed at the indicated E:T ratios in the standard cytotoxicity assay.
