BioTechniques (Mar 1998)
Development and Applications of Enhanced Green Fluorescent Protein Mutants
Abstract
The introduction of several mutations resulted in the generation of improved mutants of the green fluorescent protein (GFP). A strong green (GFPsg25) and blue (BFPsg50) fluorescent protein, gave 50-fold–100-fold brighter fluorescence compared to wild-type GFP and BFP (Tyr66His), respectively, upon expression in mammalian cells. GFPsg25 and BFPsg50 have different excitation and emission maxima. This allows their use as an efficient dual-color tagging system and their independent detection in living cells.