Cytokines & Growth Factors

Q: Why choose carrier-free cytokines?

Carrier-free proteins contain no stabilizers (e.g., BSA), minimizing assay interference and enabling precise mass-based dosing.

Q: Do mammalian-expressed proteins improve activity?

HEK293/CHO provide native PTMs and glycosylation, often improving receptor binding and stability compared with bacterial expression.

Q: Recommended working concentrations?

Assay-dependent; common starting ranges include IL-2 10–100 IU/mL and VEGF 5–50 ng/mL. Titrate for your system.

Q: Storage & reconstitution tips

Use endotoxin-free buffers, avoid vigorous vortexing, and aliquot to minimize freeze-thaw cycles. Follow the lot-specific CoA.

Home > Products > Recombinant Proteins > Cytokines and Growth Factors

Explore 1,000+ bioactive recombinant cytokines and growth factors for immune cell differentiation, stem cell culture, and signaling studies. Produced in HEK293, CHO, and E. coli systems. QC-verified for purity (≥95%), endotoxin (≤0.1 EU/µg), and functional activity. Available in carrier-free, His-tag, Fc-chimera formats. RUO

Why Researchers Choose abinScience

Verified Bioactivity Functional validation via ELISA or cell-based assay; high lot-to-lot consistency

High Purity & Low Endotoxin Typical ≥95% purity; ≤0.1 EU/µg; lot-specific CoA

Native PTMs HEK293/CHO preferred for correct folding and glycosylation

Flexible Formats Carrier-free, His, Fc; lyophilized or liquid

Scalable & Reliable From µg to mg; global cold-chain shipping

Popular Subcategories

Selection Guide

Application: Use carrier-free for sensitive bioassays (e.g., organoids, SPR).
Expression System: HEK293/CHO for native glycosylation; E. coli for screening.
Endotoxin: Target ≤0.1 EU/µg for immune cell assays; verify with CoA.
Tag/Format: His for purification; Fc for avidity; lyophilized for storage.