Specificity: Glial Fibrillary Acidic Protein (GFAP) is specific to astrocytes and ependymal cells of the central nervous system. This product effectively stains astrocytes, glial cells, ependymal cells and their associated tumors. Immunogen: Porcine Spinal Chord Molecular Weight: 51-52kDa Information: Cellular Localization: Cytoplasmic.