With carrier: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2 containing 20 μg BSA per 1 μg hOSM. Carrier free: Lyophilized from a 0.22 μm filtered solution of PBS, 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||>98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant hOSM. All lots are greater than 98% pure.|
|Endotoxin||Less than 0.01 ng endotoxin/1 μg hOSM.|
|Activity||The bioactivity of recombinant hOSM was determined in a TF-1 cell proliferation assay. The ED50 of each lot is between 50-500 pg/ml.|
|Molecular Formula||Based on amino acid sequencing, greater than 85% of recombinant hOSM starts at Aa26 (AAIGS) and has a calculated MW of 19,249. The remainder starts at Ile28 (IGSCS). DTT-reduced and non-reduced protein migrate as 32 kDa polypeptides. Lower mobility in SDS-PAGE is due to glycosylation.|
Recombinant human Oncostatin M (hOSM) Ala26-Arg221 (Accession #NP_065391) was expressed in human 293 cells at Cell Signaling Technology.
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