Recombinant Human IL-18 Protein
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Overview
Interleukin-18 (IL-18) is a proinflammatory cytokine that plays a role in both the innate immune and acquired immune responses. IL-18 stimulates T cells, NK cells and dendritic cells and can act in combination with other interleukins to stimulate interferon (IFN)γ. Recombinant IL-18 can be used to reduce proliferation and maintain pluripotency in hematopoietic stem cells. IL-18 may have potential therapeutic applications in enhancing antitumor immunity by promoting the differentiation of effector T cells.
Qkine recombinant human IL-18 is an 18 kDa highly pure and bioactive protein suitable for immune cell culture and activation.
Download the Product Data Sheet for species reactivity, reconstitution instructions, bioactivity, purity, and additional product information.
Contact us for Quality and Safety documentation or for information on cell therapy grade growth factors and cytokines.
Product Features
- High purity human protein (Uniprot: Q14116)
- 18 kDa (monomer)
- >98%, by SDS-PAGE quantitative densitometry
- Expressed in E. coli
- Animal origin-free (AOF) and carrier protein-free
- Manufactured in Qkine’s Cambridge, UK laboratories
- Lyophilized from PBS and TCEP
- Resuspend in sterile-filtered water at >50 µg/ml, add carrier protein if desired, prepare single use aliquots and store frozen at -20 °C (short-term) or -80 °C (long-term).
Featured Applications:
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- Drug discovery in inflammation
- Development and formation of NK cells
- Stimulation of activated T cell proliferation
- Hematopoietic stem cell regulation
- Autoimmune disease research
- Cancer immunotherapy
RoosterBio is a distributor of Qkine growth factors and cytokines within the Unites States, for regional specific orders please contact us for more information.
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How do I store my proteins?
- Lyophilized store at -20°C or -80°C for up to 2 years
- Reconstituted store at -20 °C or -80 °C
- We recommend that single use aliquots are prepared to avoid freeze-thaw cycles
How do I reconstitute lyophilized protein?
- Check the resuspension solution recommendation on the product datasheet.*
- Centrifuge briefly before reconstituting to ensure all powder is at the bottom of the vial.
- Add sufficient reconstitution solution to give a protein concentration of 0.05–1.0 mg/ml.
- Allow the reconstituted sample to stand at room temperature for >1 minute before gently agitating. Do not vortex and avoid foaming.
- Prepare single-use aliquots whenever possible to avoid freeze-thaw cycles, which can damage the proteins and reduce bioactivity. Store aliquots at -80°C (or -20°C).**
NOTES
*Physiological buffers may cause precipitation of proteins during reconstitution. This is especially important for TGF beta family and other related growth factors, so it is very important that these are reconstituted in Solution A (10 mM HCl, 1:1000 dilution of concentrated HCl).
**All our proteins are supplied carrier protein-free. If compatible with your work and you are storing at lower concentrations (<50 μg/ml), adding carrier protein is highly advised (usually 1% w/v high purity BSA or equivalent – ensure all buffers are sterile-filtered).