The winners of the 2008 Nobel prize in chemistry are Osamu Shimomura, Martin Chalfie, and Roger Tsien for their work on green fluorescent protein. Shimomura first isolated GFP from a jellyfish and showed that it glows under UV light; Chalifie demonstrated that it could tag cells; and Tsien worked on getting it to produce other colors. At The Daily Transcript, Alex Palazzo is celebrating -- he'd guessed that Tsien would win. "This is a well deserved prize. Flip open any biomedical journal and you'll see why - Green Fluorescent Protein (aka GFP) is probably the most used gene in the world," he writes.