Heterologous competition binding of
125I-labeled wild-type (1 nM) in the presence of increasing
concentrations on nonlabeled CryIAb, N372A, N372G, DF-1, and D3 toxins.
Gypsy moth BBMV (200 μg/ml per tube) was used, and each point is an
average value of three individual experiments. Binding is expressed as
a percentage of the total amount bound upon incubation with labeled
toxin.