Contents

28 April 2009
Vol 2, Issue 68

About The Cover

Cover image expansion

COVER This week's issue of Science Signaling features a Review on signaling by the gasotransmitters nitric oxide, carbon monoxide, and hydrogen sulfide. The image shows a blood vessel, which can undergo vasorelaxation in response to any of these three gases. [Image: Christopher Bickel, AAAS]