Proteolytic processing of inclusion proteins of Bt strains. M Genei Protein marker. Lanes 1, 3, 5 solublized inclusion protein. Lanes 2, 4, 6 proteinase K-treated solubilized protein. Lanes 1, 2 reference strain of ps4 A1470. Lanes 3 and 4, 5 and 6 Bt isolates T186 and T98, respectively