Microbial odd chain fatty acids

1) A genetically modified bacteria, said bacteria having:

• a) an overexpressed propionyl-CoA synthase gene;
• and
• b) an overexpressed β-ketoacyl-acyl carrier protein synthase III gene with a greater substrate preference for propionyl-coA than acetyl-coA;
• wherein said bacteria makes more odd-chain fatty acids than a control bacteria lacking a) and b).