Product Information

Formulation

With carrier: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2 containing 20 μg BSA per 1 μg hIL-6. Carrier free: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2.

Storage

Stable in lyophilized state at -20°C for 1 year after receipt. Sterile stock solutions reconstituted with carrier protein are stable at 4°C for 2 months and at -20°C for 6 months. Avoid repeated freeze-thaw cycles.
Maintain sterility. Storage at -20°C should be in a manual defrost freezer.

Product Description

MW (kDa)	22
Purity	>98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant hIL-6. All lots are greater than 98% pure.
Endotoxin	Less than 0.01 ng endotoxin/1 μg hIL-6.
Activity	The bioactivity of recombinant hIL-6 was determined in a TF-1 cell proliferation assay. The ED₅₀ of each lot is between 0.2-0.7 ng/ml.
Molecular Formula	Based on amino acid sequencing, greater than 60% of recombinant hIL-6 has a Met on the amino-terminal Val30 (sequence of MVPPG) and has a calculated MW of 20,943. The remainder starts at pro 32 (sequence of PPGED) or Pro33 (sequence of PGEDS). DTT-reduced protein migrates as a 23 kDa polypeptide and non-reduced protein migrates as a 22 kDa polypeptide due to intramolecular cystines.

Source / Purification

Recombinant human IL-6 (hIL-6) Val30-Met212 (Accession #NM_000600) was produced in E. coli at Cell Signaling Technology.

Background

IL-6 is a potent inducer of the acute phase response and is produced by T cells, macrophages, fibroblasts, endothelial and other cells (1,2). IL-6 induces proliferation and differentiation and acts on B cells, T cells, thymocytes, and others. IL-6 in concert with TGFβ is important for developing Th17 responses. IL-6 binds to IL-6Rα and through this association induces gp130 homodimerization (1). gp130 homodimerization triggers the Jak/Stat cascade and the SHP2/Erk MAP kinase cascade (1,3,4). IL-6 also forms a complex with an IL-6Rα splice variant that is non-membrane associated (3).The IL-6/soluble IL-6Rα complex can then activate the gp130 signaling pathway on cells that express gp130 but not IL-6Rα (3). IL-6, through increasing expression of proangiogenic VEGF, may contribute to metastatic breast cancer (5).

Database Links

UniProt ID: P05231

Entrez-Gene Id: 3569

Product Citations: 3

Limited Uses

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For Research Use Only. Not For Use In Diagnostic Procedures.

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Human Interleukin-6 (hIL-6) #8904