Figure 5

Binding of ¹²⁵I-labeled Cry1Ca to S. exigua BBMV. (A) Homologous competition. ¹²⁵I-labeled Cry1C was incubated with BBMV from susceptible (FRA) or resistant (Xen-R) insects in the presence of increasing concentrations of unlabeled Cry1C toxin. (B) Dissection of total binding into their reversible and irreversible components. Contribution of both components to the binding of ¹²⁵I-labeled Cry1Ca to BBMV from susceptible and resistant insects were compared. T-test (P = 0.7244 for the reversible component) (P = 0.0170 for the irreversible component). BBMV, brush border membrane vesicles.