title: Asporogenous Bacillus thuringiensis Mutant Producing High Yields of delta-Endotoxin.
abstract: An asporogenous Bacillus thuringiensis subsp. kurstaki strain IK mutant, strain 290-1, which produced high yields of delta-endotoxin, was obtained by ethyl methane sulfonate treatment of a spore suspension. The mutant strain produced about the same amount of delta-endotoxin as that produced by the parent strain, but 10 to 10 cells did not form any detectable dormant spores.
authors.affiliation: Shionogi Research Laboratories, Shionogi & Co., Ltd., Fukushima-ku, Osaka 553, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Wakisaka
authors.forename: E
authors.initials: E
authors.lastname: Masaki
authors.forename: K
authors.initials: K
authors.lastname: Koizumi
authors.forename: Y
authors.initials: Y
authors.lastname: Nishimoto
authors.forename: Y
authors.initials: Y
authors.lastname: Endo
authors.forename: M S
authors.initials: MS
authors.lastname: Nishimura
authors.forename: J
authors.initials: J
authors.lastname: Nishiitsutsuji-Uwo