Roger Yonchien Tsien was born on February 1, 1952, and died on August 24, 2016.
He was an American biochemist.
Tsien was a professor of chemistry and biochemistry at the University of California, San Diego and was awarded the 2008 Nobel Prize in Chemistry for his discovery and development of the green fluorescent protein, in collaboration with organic chemist Osamu Shimomura and neurobiologist Martin Chalfie.
He was also a pioneer of calcium imaging.
Roger Y. Tsien contributed to the fields of cell biology and neurobiology by discovering genetically programmable fluorescent tags, thereby allowing scientists to watch the behavior of molecules in living cells in real time.
Tsien also developed fluorescent indicators of calcium ions and other ions important in biological processes.
Professor Roger was awarded in 2004 the Wolf Prize in Medicine “for his seminal contribution to the design and biological application of novel fluorescent and photolabile molecules to analyze and perturb cell signal transduction.
Roger Yonchien Tsien passed away at 64 years old.