31 August 2010
Vol 3, Issue 137

About The Cover

Cover image expansion

Online Cover This week, Science Signaling features a Focus Issue that highlights protein phosphorylation, a central process in signal transduction pathways. The image shows representatives of two sides of the phosphorylation coin, with a crystal structure of the kinase domain of one isoform of protein kinase C (blue; PDB 3A8W) and a structure of the catalytic subunit of the protein phosphatase PP1 (green; PDB 1S70). [Image: Chris Bickel, AAAS]