Inhibition of FCR-3–infected cell binding to C32 cells. The C32 cells were pretreated with LF at the indicated concentrations. After removal of the LF solution, the slides were subjected to the cytoadherence assay. Each point represents the mean ± SD of triplicate determinations. The average number of FCR-3 bound to C32 amelanotic melanoma cells in the absence of LF was 6.66 PEs/melanoma cell.