Profile: Fivephoton Biochemicals supplies innovative research kits and reagents to academic & industrial research institutions. Extracellular immunofluorescence cell labeling kit is used for labeling of extracellular epitopes for immunofluorescent detection which is an important method to characterize protein trafficking in cells, as well as in mapping of extracellular domains of multi-pass transmembrane proteins. Extracellular immunofluorescence labeling procedures are often employed to determine whether transmembrane proteins are positioned on the cell surface. Our kit does not permeabilize cell membranes, enabling selective immunofluorescent labeling of extracellular epitopes. Immunofluorescence is displayed on the cell periphery after employing the labeling kit.