FIGURE 4.

Recognition of soluble ricin and ricin subunits by VHH homodimers. ELISA plates were coated with ricin and then probed with VHH homodimers JNA6 (A–C), JNA2 (D–F), or JNA3 (G–I) in the presence of 2-fold serial dilutions of soluble ricin (left panels), RTA (middle panels), or RTB (right panels). The percent of antibody bound to the plate is indicated on the y axis. The results represent a single representative experiment done in triplicate with each data point indicating mean ± S.D. In most instances error bars are masked by symbols and therefore not visible.