“Roger’s vision was vast and yet incredibly precise,” David Brenner, the vice chancellor at the UCSD Health Sciences and dean of UCSD School of Medicine, said in a statement sent to The Scientist. “He saw both the big picture, but also the incredible need to see and understand—in glorious color—all of the infinitesimal details that make it up, that make up life.”
Tsien is best known for his work on green fluorescent protein (GFP)—but he expanded fluorescent labeling into different colors, and even the infrared. “By working to understand the mechanisms behind GFP's florescence, Tsien has developed several related proteins that glow in virtually all the colors of the rainbow,” The Scientist reported in 2008 when Tsien won the Nobel with Osamu Shimomura and Martin Chalfie. Tsien and his colleagues later designed a technique to visualize fluorescent proteins using electron microscopy.
“I’ve always been attracted to colors,” Tsien told the San Diego Union-Tribune in 2008. “Color helps make the work more interesting and endurable. It helps when things aren’t going well. If I had been born color-blind, I probably never would have gone into this.”
According to the Union-Tribune today (August 31), Tsien died on a bike trial in Eugene, Oregon, but the precise cause of his death was not yet determined.
“He was ever the adventurer, the pathfinder, the free and soaring spirit,” Tsien’s wife Wendy said in the statement from UCSD. “Courage, determination, creativity and resourcefulness were hallmarks of his character. He accomplished much. He will not be forgotten.”