Maxpar OnDemand antibodies come in fixed 15 μg (0.5 mg/mL) vials and ship within 6 business days. AE-1/AE-3 is a broad spectrum anti-pan-cytokeratin antibody cocktail, which differentiates epithelial tumors from non-epithelial tumors. This antibody stains cytokeratins present in normal and abnormal human tissues and has shown high sensitivity in the recognition of epithelial cells and carcinomas.