FIG. 5.

Neutralization studies with antibodies against MDC, I-309, and IL-16. Supernatants after 4 h of stimulation were preincubated overnight at 4°C with anti-MDC, anti-I-309, and anti-IL-16 antibodies (5 μg/ml) alone or combined. The supernatants were diluted 1:2 when added to the inhibition test (see Materials and Methods). At day 9, p24 antigen of the supernatant fluids of the inhibition assays was measured. The experiment represents the average of three independent experiments. The controls include the isotype antibodies.