Contents

24 April 2012
Vol 5, Issue 221

About The Cover

Cover image expansion

Online Cover This week features research that uses bioluminescence resonance energy transfer (BRET) to study conformational changes in β-arrestin (Zimmerman et al.) and Förster resonance energy transfer (FRET) to assess changes in the multiprotein complexes that form during T cell receptor signaling (Pauker et al.). The image is a composite of FRET signals, showing interactions among proteins in response to T cell activation. [Images: Maor H. Pauker, Bar-Ilan University, Ramat-Gan, Israel. Composition: Chris Bickel, AAAS]