Figure 3. RTB-B7 neutralizes ricin in a dose-dependent manner.

Ricin was mixed with 2-fold serial dilutions of indicated antibodies and then applied to (A) Vero cells or (B) THP-1 cells for 2 h. The cells were then washed and cell viability was measured 48 h later, as described in Materials and Methods. The data (mean ± SD) represent a single experiment in which each sample was done in quadruplicate. The experiment was repeated at least twice with identical results.