01 June 2010
Vol 3, Issue 124

About The Cover

Cover image expansion

Online Cover This week's issue features a Perspective describing how ammonia released from cells acts as a paracrine and autocrine signal to control autophagy. This work was published in a Research Article by Eng et al. in the 27 April 2010 issue. The image depicts an artist's rendition of a cell releasing ammonia. [Image: Chris Bickel, AAAS]