The 27 kDa green fluorescent protein (GFP) from jellyfish Aequorea
Victoria (jfGFP), which excitation and emission maxima were 475 and
508 nm, respectively, was discovered and isolated by Shimomura
(1979). The jfGFP contains a chromophore induced from the amino
acid sequence of -Ser-Tyr-Gly- within the protein structure by cyclization,
dehydration, and aerial oxidation (Tsien, 1998; Miyawaki et al.,
2003).