Studies on the delta-endotoxin of Bacillus thuringiensis var. tenebrionis
- 1 February 1986
- journal article
- Published by Oxford University Press (OUP) in FEMS Microbiology Letters
- Vol. 33 (2-3) , 261-265
- https://doi.org/10.1016/0378-1097(86)90249-1
Abstract
Parasporal crystals of the recently isolated Bacillus thuringiensis var. tenebrionis are toxic for coleopteran larvae. Unlike those of other strains they are soluble either in aqueous solutions of NaBr at neutral pH or in water after titration to pH values above pH 10.0. The dissolved crystal protein readily forms crystals after removal of the salt or neutralization. The crystal protein was not found to differ much in the amino acid composition from other crystal proteins. The parasporal crystals are composed of subunits of Mr 68 000 which are not linked by disulfide bridges.Keywords
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