FIG. 3.

Binding affinity of the peptide 4-phycoerythrin conjugate to spores of B. subtilis. At the indicated concentrations, conjugate binding was measured as mean fluorescence per spore as determined by FACS. Each measurement was performed in triplicate, and the average of the three determinations was plotted as relative fluorescence versus the concentration of the conjugate. The error bars indicate the range of the determinations. The same data were plotted linearly and semilogarithmically (inset).