Figure 1

Binding of ¹²⁵I-GGPG. Stationary phase bacteria, 2.5 × 10⁷ CFU/ml, were incubated with the indicated concentrations of I¹²⁵-GGPG for 60 min at 0 °C, and centrifuged through a phthalate ester "cushion" to separate free and bound peptides. The data points are mean ± SEM values from 5 to 9 replicates obtained in three separate experiments. Using the Mann-Whitney test, P was < 0.05 at values indicated by ^**.