Description: The Foxp3 Fixation/Permeabilization Concentrate and Diluent solutions have been formulated and optimized for Foxp3 staining with the FJK-16s, NRRF-30, PCH101, 236A/E7 and eBio7979 monoclonal antibodies. It has also been shown to work for other transcription factors suchs as Nanog, Tbet, Gata-3, Ror-gamma as well as cytokines.