Fig. 2.

Intravenous immunoglobulin (IVIg) interferes with the binding of phytohaemagglutinin (PHA) to Jurkat T cells. Jurkat T cells were incubated with AF488-PHA in the presence of increasing concentrations of human serum albumin (HSA) or IVIg, for 30 min at 37°C, followed by fluorescence determination by flow cytometry. The mean [± standard deviation (s.d.)] of mean fluorescence intensity (MFI) from three independent experiments are shown. **P < 0·01 [one-way analysis of variance (anova) followed by Dunnett's post-test].