Incucyte ® Human FabFluor-pH Red Antibody Labeling Reagent utilizes a novel pH-sensitive dye coupled antibody fragment, which labels Fc-containing human test antibodies and allows for rapid antibody internalization and kinetic high-throughput analysis. The FabFluor reagent is specifically formulated for use in the Incucyte ® Live-Cell Analysis System and can be added directly to tissue culture wells using a no wash, simple mix and read protocol to acquire live cell images of adherent and non-adherent cells.