Green Fluorescent Protein (GFP) is a spontaneously fluorescent 27kDa protein originally isolated from the jellyfish Aequorea victoria
The molecular cloning of the GFP gene
and its subsequent expression in heterologous systems
has established GFP as a valuable reporter molecule for in vivo visualization of gene expression events in a wide variety of cell types and organisms. Since, GFP requires no additional substrates or cofactors, GFP′s green fluorescence can be easily detected using blue or UV light after expression in either prokaryotic or eukaryotic cells. In addition, several mutant forms of GFP with unique spectral properties (e.g., enhanced fluorescence signal and shifts in excitation and emission spectra) have been reported.
Mixture of two high-affinity monoclonal antibodies selected for their performance in detection of GFP and GFP fusion proteins.