Objective:To study the construction of matrix metalloproteinase 3(MMP3)biosensor vector,and to illuminate the activated process of MMP3 in the living cells.Methods:The ECFP-MMP3-YPet biosensor vector anchored on cellular surface was constructed and identified.The MMP3 biosensor was transfected into the 293 T cells.The transfection efficiency was observed 24 hafter transfection.The flurorescence resonance energy transfer(FRET)-based MMP3 biosensor was observed by inversion fluorescence microscope.Results:The...