The cytoskeleton is an array of highly ordered filaments that maintains the shape, structure, and functionality of cells. There are three major types of filaments: actin filaments, microtubules, and intermediate filaments. The distinctions among them are based on protein composition and arrangements. Glial fibrillary acidic protein (GFAP) is a 50 kDa component of the intermediate filaments and was originally identified in astrocytes. The overall structure of GFAP, which confirms its similarities to other intermediate filament proteins, indicates a central rod of about 130 amino acids flanked by coiled regions. GFAP has been extensively used as an immunohistochemical marker for tumors derived from astroglia.
This antibody is routinely tested by western blot analysis. Other applications were tested at BD Biosciences Pharmingen during antibody development only or reported in the literature.