Figure 1

Binding of biotinylated Cry1Ac (a), Cry2Aa (b) and Cry1Ca (c) to BPH and PWS gut BBMV. Twenty micrograms of BBMV protein were used along with 0.1 micrograms of biotinylated Cry proteins. A 100-fold excess of unlabeled Cry1Ac, Cry2Aa or Cry1Ca was used in competition assays. Toxin binding to S. exigua gut BBMV was used as a positive control treatment.