23 October 2012
Vol 5, Issue 247

About The Cover

Cover image expansion

Online Cover This week features a Research Article that describes how Akt counteracts growth-promoting signals by inhibiting the transcriptional silencer and Polycomb group protein Bmi1, thus leading to the transcription of tumor suppressor genes. The image shows a Polycomb group protein altering chromatin structure. [Image: Yana Hammond/AAAS]