How to make better biofuels? Convince yeast it's not starving

Adam Hadhazy, Office of Engineering Communications

Yeast already helps make bread and beer and cranks out the biofuel ethanol, but scientists believe it can be used to create an even more efficient fuel called isobutanol. Normally, yeast only creates a tiny amount of isobutanol. Now researchers at Princeton University have discovered a genetic switch that significantly ramps up production. Isobutanol has about a 25% greater energy density than ethanol and is much better suited for use in vehicles than current ethanol-based fuels. Biofuels can be a renewable and environmentally friendly alternative to petroleum-based fuels.