redOrbit: Scientists at the Department of Energy’s Oak Ridge National Laboratory are improving strains of microorganisms used to convert cellulosic biomass into ethanol, including a recent modification that could improve the efficiency of the conversion process. Biofuels researchers and industrials have generated improved mutant microorganisms previously, but authors of a paper in the on-line Proceedings of the National Academy of Sciences identify a key Z. mobilis gene for the first time and …