Roger Tsien

Nobel Prize-winning chemist Roger Tsien died on Aug. 24 in Eugene, Oregon. He was professor of pharmacology, chemistry, and biochemistry at the University of California San Diego School of Medicine. His work on illuminating life within living cells through the discovery and development of green fluorescent protein derived from the jellyfish Aequorea victoria led him to co-win the 2008 Nobel in chemistry. That work was done in collaboration with Osamu Shimomura and Martin Chalfie.