PhotonsSpectrometry, FluorescenceRhodaminesDiffusionFluorescent DyesFluorescenceMicroscopy, FluorescenceGreen Fluorescent ProteinsModels, TheoreticalLuminescent ProteinsMagnetic Resonance SpectroscopyFluorescence PolarizationSpectroscopy, Near-InfraredIn Situ Hybridization, FluorescenceFluorescence Resonance Energy TransferSpectrum AnalysisElectron Spin Resonance SpectroscopySpectrophotometry, InfraredSpectrum Analysis, RamanProtein ConformationKinetics