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Glial fibrillary acidic protein (GFAP) is the 10nm or intermediate filament protein found specifically in astrocytic cells in the central nervous system.

Image: GFAP staining of mouse retinal astrocytes. Image and Protocol Courtesy of Sal Stella, UCLA.

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Image: Staining of of Astrocytes in the Ventral horn and Funiculus of Adult Rat Spinal Cord. Courtesy of Dr. Qi-lin L. Cao, University of Louisville School of Medicine. Dilution 1:500

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Image:  GFAP (Chicken-Cat#: CH22102) staining in of enteric glia in the myenteric plexus of the mouse gastrointestinal tract. Staining was performed in methanol/acetone fixed frozen sections using 1:1000 dilution of the antibody followed by 1:500 anti-chicken Alexa 594. Courtesy of Dr. Kate Ellacott, Vanderbilt University.