29 September 2009
Vol 2, Issue 90

About The Cover

Cover image expansion

Online Cover This week's issue features a Focus Issue that highlights how changes in redox state and reactive species produced by reduction-oxidation reactions trigger changes in cellular behavior. In some cases, these signals couple cellular metabolic state to changes in gene expression. The image is an artist's depiction of a nucleus (the site of gene expression) and mitochondria (the site of energy production and oxygen utilization) within a cell. [Image: Chris Bickel, AAAS]