RecombinantIL-18, Rat

Interleukin-18 (IL18, also known as interferon-gamma inducing factor or IGIF) is a cytokine that belongs to the IL-1 superfamily and is produced by macrophages and other cells. Its biological activity is pleiotropic and it has been shown to induce interferon-gamma production in KG-1 cells. The combination of this cytokine and IL12 has been shown to inhibit IL4 dependent IgE and IgG1 production, and enhance IgG2a production in B cells.Recombinant rat Interleukin-18 (rrIL-18) produced in E.coli is a single non-glycosylated polypeptide chain containing 159 amino acids. A fully biologically active molecule, rrIL-18 has a molecular mass of 18.4 kDa analyzed by reducing SDS-PAGE and is obtained by proprietary chromatographic techniques at GenScript.

Product Specifications

CAS Number

9000-83-3

Endotoxin

< 0.2 EU/μg, determined by LAL method.

Purity

> 95% by SDS-PAGE analyses.

Bioactivity

ED50 <2μg/ml resulted in the secretion of 0.15 ng/ml h-IFN-gamma when tested using KG-1 cell line, corresponding to a specific activity of > 500 units/mg.

Reconstitution

Reconstituted in ddH2O at 100 μg/ml.

Molecular Weight

18.4 kDa, observed by reducing SDS-PAGE.

Storage Conditions

Lyophilized recombinant ratInterleukin-18 (rrIL-18) remains stable up to 6 months at -80°C from date of receipt. Upon reconstitution, rrIL-18 should be stable up to 2 weeks at 4°C or up to 3 months at -20°C.

Appearance

Sterile Filtered White lyophilized (freeze-dried) powder.

Formulation

Lyophilized after extensive dialysis against 50mM Tris, 50mM NaCl, pH8.0.

Host or Source

Escherichia coli.

Recommended Usage

This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. For research use only.

AA Sequence

MHFGRLHCT TAVIRSINDQ VLFVDKRNPP VFEDMPDIDR TANESQTRLI IYMYKDSEVR GLAVTLSVKD GRMSTLSCKN KIISFEEMNP PENIDDIKSD LIFFQKRVPG HNKMEFESSL YEGHFLACQK EDDAFKLVLK RKDENGDKSV MFTLTNLHQS