ISOLATION AND PARTIAL CHARACTERIZATION OF BINDING-PROTEINS FOR IMMOBILIZED DELTA ENDOTOXIN FROM SOLUBILIZED BRUSH-BORDER MEMBRANE-VESICLES OF THE SILKWORM, BOMBYX-MORI, AND THE COMMON CUTWORM, SPODOPTERA-LITURA

1. Brush border membrane vesicles (BBMV) were prepared from the Bombyx mori, and Spodoptera litura, midguts. BBMV was solubilized. 2. Activated delta endotoxin from Bacillus thuringiensis were immobilized. 3. Solubilized BBMV proteins were applied to the toxin column and the proteins bound were analyzed by SDS-PAGE. 4. In the case of B. mori M(r) 220,000, 150,000 and 130,000 and in the case of S. litura 160,000 bands were detected. 5. The bindings were inhibited by N-acetyl galactosamine and mannose. 6. The binding proteins applied onto a Con A column and eluted by 0.1 M methyl-alpha-glucose, suggesting that hybrid type sugar sidechain may involve in the interaction.