18 August 1995
Vol 269, Issue 5226

About The Cover

Diagonally opposed images of carbon monoxide (CO) bound to (upper left) and photodissociated from (lower right) the heme in myoglobin. The orientation of CO was determined with time-resolved polarized infrared spectroscopy. As illustrated schematically, a visible laser pulse (red) photodissociates the CO from the heme and an infrared pulse (gray), arriving 10−10 seconds later, probes the infrared spectrum of CO. See page 962 and the related News story on page 921. [Illustration: M. Lim, T. Jackson, and P. Anfinrud]