Figure 6
Virus-specific antibody responses in pig-tailed macaques infected with SHIV-1157ipd3N4. Macaque sera were collected at the indicated times following SHIV-C inoculation and analyzed by ELISA for antibody responses directed against SIVmac whole virus (A) or HIV-1SF162 gp120 (B). Endpoint titers were defined as the reciprocal of the highest dilution that gave an optical absorbance value at least threefold higher than the average values obtained with SIV-negative macaque sera.