FIG. 1.

Binding of FITC-labeled B. subtilis to human CD14 expressed on CHO cells. Cells were incubated with labeled bacteria in the presence or absence of 1 μg of recombinant LBP per ml. The marginal binding in the presence of LBP is abolished by inclusion of 10 μg of anti CD14 MAb My4 per ml in the incubation mixture but not by the same amount of an isotype-matched control. The ratio of cells to bacteria was 1:20.