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Applied and Environmental Microbiology, October 1998, p. 4060-4061, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Activities of Bacillus thuringiensis Insecticidal Crystal Proteins Cyt1Aa and Cyt2Aa against Three Species of Sheep Blowfly

Chris N. Chilcott,1,* Peter J. Wigley,1 Andrew H. Broadwell,1 Danny J. Park,2 and David J. Ellar2

BioDiscovery New Zealand Limited, Parnell, Auckland, New Zealand,1 and Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, England2

Received 10 April 1998/Accepted 20 July 1998

The toxicity of Bacillus thuringiensis Cyt1Aa protein to sheep blowfly larvae depends on its solubilization and proteolytic activation. Cyt1Aa crystals were not toxic. Full-length and trypsin-digested Cyt1Aa proteins were toxic to larvae of three species of sheep blowfly. Neither full-length nor trypsin-digested Cyt2A soluble crystal proteins were toxic.

* Corresponding author. Mailing address: BioDiscovery New Zealand Limited, 24 Balfour Road, Parnell, Auckland, New Zealand. Phone and Fax: (9) 309 7666. E-mail: cchilcott{at}biodiscovery.co.nz.

Applied and Environmental Microbiology, October 1998, p. 4060-4061, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.




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