- Butanediol fermentation
2,3-Butanediol fermentation is
anaerobic fermentation ofglucose with2,3-butanediol as one of the end products. The overall stoichiometry of the reaction is :2pyruvate +NADH --> 2CO2 + 2,3-butanediol. Butanediol fermentation is typical forEnterobacter and is tested for using the Voges-Proskauer (VP) test.The metabolic function of 2,3-butanediol is not known.
Comparison with mixed acid fermentation
2,3-butanediol fermentation produces smaller amounts of acid than
mixed acid fermentation , and butanediol,ethanol , CO2 and H2 are the end products. While equal amounts of CO2 and H2 are created during mixed acid fermentation, butanediol fermentation produces more than twice the amount of CO2 because the gases are not produced only by formate hydrogen lyase like they are in the mixed acid fermentationReferences
* M.Madigan & J. Martinko, 11th edition, (2006) Brock's Biology of Microorganisms, NJ, Pearson Prentice Hall, (p. 351-355)
Links
http://biocyc.org/META/new-image?type=PATHWAY&object=P125-PWY
Wikimedia Foundation. 2010.