Figure 2. Effect of arabinose in the expression and biotinylation of VHH T7.
Different concentrations of arabinose were used to induce the co-expression of VHH T7 and BirA as described in the legend. The graph displays the reactivity of serial dilutions of the VHH T7 soluble extract with its cognate antigen (TCC-BSA) detected with a streptavidin-HRP conjugate. The midpoints of the curves are listed for comparison. The SDS-PAGE analysis of VHH T7 expression in the soluble freeze-and-thaw extract is shown in the insert.