2-3 butane diol
The 2,3-butanediol (2,3-butylene glycol): C4H10O2 is a colorless crystalline substance often liquid because of its melting point (23°C), water soluble and alcohol. Its semi-developed formula is:
Present also in the wine, it boils with 179°C. It is used in the resins and as solvent of some dyes. One finds it in the Amidon and the Sugar beet.
The anaerobic fermentation of glucose produces 2,3-butanediol which is one of the finished products.
2 Pyruvate + NADH --> 2 CO2 + butanediol.
The metabolic role of the 2,3-butanediol is not known.
Comparison with Mixed Acid fermentation 2,3-butanediol fermentation produces smaller amounts off acid than Mixed acid fermentation, and butanediol, Ethanol, CO2 and H2 are the end products. While equal amounts off CO2 and H2 are created during mixed acid fermentation, butanediol fermentation produces more than twice the amount off CO2 because the gases are not produced only by formate hydrogen lyase like they are in the mixed acid fermentation -->
External bonds
- http://biocyc.org/META/new-image?type=PATHWAY&object=P125-PWY