With carrier: Lyophilized from a 0.22 μm filtered solution of hIL-6Rα in 20 mM Tris, pH 7.2 containing 20 μg BSA per 1 μg
hIL-6Ra. Carrier free: Lyophilized from a 0.22 μm filtered solution of hIL-6Rα in 20 mM Tris, pH 7.2.
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.
|Purity||>90% as determined by SDS-PAGE of 6 μg reduced (+) and nonreduced (-) recombinant hIL-6Rα. All lots are greater than 90% pure.|
|Endotoxin||Less than 0.01 ng endotoxin/1 μg hIL-6Rα.|
|Activity||The activity of hIL-6Rα was determined by assessing its ability to enhance IL-6 mediated inhibition of M1 cells proliferation. The ED50 of each lot is between 2 and 15 ng/ml.|
|Molecular Formula||Molecular Characterization: Recombinant hIL-6Rα has a calculated MW of 37,871. DTT-reduced and non-reduced protein migrate as 66 kDa polypeptides. Lower mobility and heterogeneity in SDS-PAGE are due to glycosylation. The expected amino-terminal LAPRR of recombinant hIL-6Rα was verified by amino acid sequencing.|
Recombinant Human Interleukin-6 Receptor α (hIL-6Rα) Leu20 - Asp358 (Accession #NP_000556) was expressed in human 293 cells at Cell Signaling Technology.
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