Figure 2From: Characterisation of the Binding Properties of Bacillus Thuringiensis 18 Toxin on Leukaemic CellsHomologous competitive binding assays. The unlabelled toxin and biotinylated purified Bt 18 toxin were allowed to compete for binding site on A) CEM-SS, B) CCRF-SB, C) CCRF-HSB-2 and D) MCF-7 separately using fixed concentration (7.41 nM) of biotinylated purified Bt 18 toxin and various concentrations (0 nM to 59.26 nM) of the unlabelled toxin for 1 hour at 37°C.Back to article page