FFluorescence in Vivo Imaging Based on Genetically EngineeredFluorescence in Vivo Imaging Based on Genetically Engineered Probesde Alexander P. Savitsky, Yingxiao Wang, SPIEMateriasMolecular biologyBiologyImaging systems in medicineFluorescence spectroscopyMolecular probesCongressesImaging systems in biologyMolecular ProbesLuminescent Proteins