FIG. 5.

Competition of anti-GBV-C E2 MAbs and human polyclonal anti-E2 serum for binding to E2. Absorbance values for human polyclonal anti-E2 antibody incubated in the absence of a competing MAb (No Ab) or in the presence of individual anti-E2 MAbs or combinations of anti-E2 MAbs are shown. The dashed line demonstrates the cutoff value for a positive test. Symbols: *, significantly different from no-antibody control (P < 0.01); **, P = 0.02; †, P < 0.01 compared to group I absorbance values (M5 and M17). All other comparisons were not significant.