Yersinia kristensenii: A new species of enterobacteriaceae composed of sucrose-negative strains (formerly called atypicalYersinia enterocolitica orYersinia enterocolitica-Like) |
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Authors: | Hervé Bercovier Jan Ursing J Don Brenner Arnold G Steigerwalt G Richard Fanning Geraldine P Carter H H Mollaret |
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Institution: | (1) Department of Microbiology, M. S. University of Baroda, 390 001 Baroda, India;(2) Microbiology Division, Department of Pharmacy, Faculty of Technology and Engineering, M. S. University of Baroda, 390 001 Baroda, India |
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Abstract: | Induction of cellulase was observed inFusarium sp. with reduction in lag period by lactose-pregrown cells as compared with glucose-pregrown cells. Insoluble cellulose (Sigmacell)
induced maximum cellulase production in the induction medium. Supplementation of the culture growing on cellulose by cellobiose
or glucose resulted in increased cellular growth and decreased cellulase production. Stepfeeding of cellobiose to the culture
growting on carboxymethyl cellulose resulted in decreased cellulase production. Significant cellulase activity was detected
in the culture filtrate of cells growing on Sigmacell supplemented with glucose, only when the glucose disappeared from the
medium. This suggests that cellulase production may in part be regulated by catabolite repression. |
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