Contents

25 May 2007
Vol 316, Issue 5828

About The Cover

Cover image expansion

COVER Artist's rendition of a model protein, trypsin, experiencing a force. Experimental and computational techniques that apply force to single biological macromolecules provide insight into molecular properties and suggest how mechanical forces may transduce signals in cells. See the special section on single molecules beginning on page 1143. Image: Christopher Bickel/Science