Rabbit anti-Bovine Cytokeratin, WSS polyclonal antibody for IHC. Cytokeratins areintermediate filament cytoskeletal proteins essential to development anddifferentiation of epithelial cells. Approximately twenty differentcytokeratins have been identified and are classified and numbered accordingto molecular weight and isoelectric points.3 Rabbit anti-cytokeratin, widespectrum screening labels a variety of keratins representing a wide range ofmolecular weight proteins.