Interleukin-4 (IL-4) is a pleiotropic, immune-modulatory cytokine that is secreted primarily by mast cells, T-cells, eosinophils, and basophils. IL-4 plays a crucial role in hematopoiesis, the regulation of antibody production, the stimulation of activated B cell and T cell proliferation, and the differentiation of B cells into plasma cells

Human IL-4 has a molecular weight of 15.1 kDa. This protein is animal origin-free, carrier-free and tag-free to ensure its purity with exceptional lot-to-lot consistency. Qk092 is suitable for the culture of reproducible and high-quality stem cells and other relevant cells.

• High purity human protein (Uniprot number: P05112)
• >98%, by SDS-PAGE quantitative densitometry
• Source: Expressed in E. coli
• 15.1 kDa monomer
• Animal origin-free (AOF) and carrier protein-free
• Manufactured in Cambridge, UK
• Lyophilised from acetonitrile/TFA
• Resuspend in water at >100µg/mL, prepare single-use aliquots, add carrier protein if desired, and store frozen at -20°C or -80°C