<P> During sporulation , many Bt strains produce crystal proteins ( proteinaceous inclusions ) , called δ - endotoxins , that have insecticidal action . This has led to their use as insecticides , and more recently to genetically modified crops using Bt genes , such as Bt corn . Many crystal - producing Bt strains , though , do not have insecticidal properties . </P>
<P> During sporulation , many Bt strains produce crystal proteins ( proteinaceous inclusions ) , called δ - endotoxins , that have insecticidal action . This has led to their use as insecticides , and more recently to genetically modified crops using Bt genes , such as Bt corn . Many crystal - producing Bt strains , though , do not have insecticidal properties . </P>
the toxic protein secreted by bacillus theory genesis is
the toxic protein secreted by bacillus theory genesis is
crystal proteins ( proteinaceous inclusions ) , called δ - endotoxins
crystal proteins ( proteinaceous inclusions ) , called δ - endotoxins