the green protein

LITIn the summer of 1961 Osamu Shimomura and colleagues extracted the light organs of about 10,000 Aequorea jellyfish. They purified aequorin, which glows blue (emission maximum 465 nm) when it binds calcium and was published in 1962. Along the way they found a trace "green protein", renamed green fluorescent protein by Morin and Hastings in 1971. Wild-type GFP absorbs at 395 nm, with a smaller peak at 475 nm, and emits at about 508 nm. In the jellyfish, aequorin's blue is handed to GFP and comes out green. Shimomura, Chalfie and Tsien shared the 2008 Nobel Prize in Chemistry.

COMPUTEDEvery glow is CIE-computed from its peak. MODELEmission shapes are Gaussians around the cited peaks. The bell is the void; the bioluminescent ring has a violet-UV excitation inside the green emission, and an orange calcium spark sits at the centre.

add calciumUV lamp (395 nm)

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