Figure 3

Fig. 3: comparison of the structural domains of the Cry1Aa, Cry11Bb, and Cry3A. Upper view of domain I shows that the three toxins are almost identical. Front view of domain II where most of the differences among the three toxins are located, specifically in the loops at the bottom of the figure, and probably due to the presence of specificity determinants which recognize distinct receptors in the insect midgut cells. Front view of domain III which does not show major differences except for loop ß16-ß17, located at the bottom of the figure.