Papers in the Biological Sciences


Date of this Version

May 1982


Published in APPLIED AND ENVIRONMENTAL MICROBIOLOGY, May 1982, p. 1208-1209. Copyright © 1982 by the American Society for Microbiology. Used by permission.


Fractionation of fully sporulated cultures of Bacillus thuringiensis by density gradient centrifugation in NaBr produced two bands which were identified as poly- β -hydroxybutyrate. This technique generated high yields of membranebound and unbound granules of exceptional purity and degree of polymerization.

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