Raman spectra of the GFP-like fluorescent proteins.The objective of the study was to elucidate optical characteristics of the chromophore structures of fluorescent proteins.  Raman spectra of commonly used GFP-like fluorescent proteins (FPs) with diverse emission wavelengths (green, yellow, cyan and red), including the enhanced homogenous FPs EGFP, EYFP, and ECFP (from jellyfish) as well as mNeptune (from sea anemone) were measured.  High-quality Raman spectra were obtained and many marker bands for the chromophore of the FPs were identified via assignment of Raman spectra bands. 
Raman spectra
Raman spectra of the GFP-like fluorescent proteins.The objective of the study was to elucidate optical characteristics of the chromophore structures of fluorescent proteins.  Raman spectra of commonly used GFP-like fluorescent proteins (FPs) with diverse emission wavelengths (green, yellow, cyan and red), including the enhanced homogenous FPs EGFP, EYFP, and ECFP (from jellyfish) as well as mNeptune (from sea anemone) were measured. 
GFP-like fluorescent proteins