FIG. 2.

Influence of serum concentrations on C3 deposition. Different concentrations of NMS (from naive CBA/N mice) diluted with GVB²⁺ were incubated with PspA⁺ or PspA⁻ pneumococci. In each case, the bacteria were incubated with serum for 30 min at 37°C. Error bars indicate the standard errors of three experiments.