Permeabilization Wash Buffer is useful for intracellular staining procedures, e.g., in preparation of cells for staining intracellular cytokines or other proteins. Permeabilization Wash Buffer is used to permeabilize cells following fixation with Fixation Buffer (Cat. No. 420801). It is supplied as a 10X solution and should be diluted in deionized water prior to use. Permeabilization Wash Buffer has been formulated to have minimal effects on cells, reduce non-specific staining and enhance the signal to noise ratio. It can be used for antibody dilutions and cell washing during intracellular staining.