Effect of proteolipid onZymomonas fermentation of 25% glucose media

Zymomonas mobilis produces more than three times as many colony-forming units when grown in the presence of a combination of protein and lipid medium supplements than in unsupplemented cultures. The specific ethanol production rate is twice as fast, and the percent yield is higher (92% vs 82%), in supplemented than in unsupplemented broth. In addition, there is a change in the phospholipid composition of cells grown in the presence of supplements. Both materials are required for enhancement of fermentation and growth.