Plasmids and Insecticidal Activity of Delta-endotoxin Crystals from Bacillus thuringiensis var. israelensis
スポンサーリンク
概要
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The insecticidal activities of 12 strains of Bacillus thuringiensis var. israelensis and purified delta-endotoxin crystals from the 4Q1 strain against mosquito larvae, Culex pipiens pollens, were measured and then compared with those of B. thuringiensis var. kurstaki and Bacillus sphaericus. Plasmid DNAs in acrystalliferous or crystalliferous strains of those bacteria and varieties were isolated and analyzed by agarose gel electrophoresis. There were at least 7 plasmids in the 4Q1 strain. To determine the specific plasmid coding the mosquito-toxic endotoxin protein, the relationship between the activities and the plasmid patterns of those strains was investigated. The strains harboring the plasmid pBTI-6 NDA (70 megadaltons) had insecticidal activity even though they were acrystalliferous mutants, but all strains lacking the plasmid pBTI-6 DNA did not have the activity.
著者
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Komano Tohru
Laboratory Of Biochemistry Department Of Agricultural Chemistry Kyoto University
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SEN Kikuo
Laboratory of Biochemistry, Department of Agricultural Chemistry, Kyoto University
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Koyama Naoto
Laboratory Of Biochemistry Department Of Agricultural Chemistry Kyoto University
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Himeno Michio
Laboratory Of Applied Molecular Biology Department Of Applied Biochemistry Osaka Prefecture Universi
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IKEDA Masao
Laboratory of Biochemistry, Department of Agricultural Chemistry, Kyoto University
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YAMAMOTO Haruyasu
Sumitomo Chemical Co., Ltd., Takarazuka Research Center
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NAKAYAMA Isamu
Sumitomo Chemical Co., Ltd., Takarazuka Research Center
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