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Binding of 125I-labeled Cry1Ac (A) and 125I-labeled Cry1Aa (B) to BBMV from susceptible (SC) (•, solid line) and Cry1Ac-resistant (AR at the 11th generation of selection) H. zea (▴, broken line) at increasing concentrations of unlabeled homologous competitor. The data represent the means of four experiments for SC and two experiments for AR, and the error bars indicate the standard error of the mean.
