Roger Y. Tsien

Roger Y. Tsien shared the 2008 Nobel Prize in Chemistry for his discovery and development of the green fluorescent protein (GFP). He built upon the work of Osamu Shimomura and Martin Chalfie by creating an array of brightly colored glowing proteins.

Tsien's engineered GFP variants allow scientists to tag specific proteins and visualize them inside living cells without harmful dyes. This breakthrough is widely used in biochemistry and oncology to track how cancer cells spread and how neurons fire in real-time.

Tsien spent the majority of his career as a professor at the University of California, San Diego (UCSD), working in the department of pharmacology and chemistry. He conducted his pioneering research on fluorescent molecules at the Howard Hughes Medical Institute alongside UCSD.

Roger Y. Tsien passed away on August 24, 2016, at the age of 64. He died while on a bike trail in Eugene, Oregon, leaving behind a massive legacy in the fields of cell biology and biochemistry.