While much is known about how enzymes and molecules are involved in cellular respiration, the understanding of the respiration system as a whole remains limited. Researchers at the Department of Energy (DOE)’s Joint BioEnergy Institute (JBEI) have gained insight into how cellular respiration is affected by the membrane environment in which it occurs. By engineering lipid synthesis to carefully control the membrane composition, researchers found that lipids, which consist of fatty acid molecules and determine membrane viscosity, also tightly control the rate of bacterial and yeast respiration. As lipid synthesis in these hosts is often engineered in order to produce molecules, these findings suggest new ways by which the pathways to produce biofuels and bioproducts could be optimized to maintain proper respiratory function, thereby increasing production. For more, read the JBEI news story.