With carrier: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2 containing 20 μg BSA per 1 μg hGM-CSF. 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 hGM-CSF. All lots are greater than 98% pure.|
|Endotoxin||Less than 0.01 ng endotoxin/1μg hGM-CSF.|
|Activity||The bioactivity of recombinant hGM-CSF was determined in a TF-1 cell proliferation assay. The ED50 of each lot is between 5-500 pg/ml.|
|Molecular Formula||Recombinant hGM-CSF does not have a Met on the amino terminus and has a calculated MW of 14477. DTT-reduced protein migrates as a 14 kDa polypeptide and non-reduced protein has slightly greater mobility due to intramolecular cystines. The expected amino-terminal APARS of recombinant hGM-CSF was verified by amino acid sequencing.|
Recombinant human GM-CSF (hGM-CSF) Ala18 - Glu144 (Accession # NM_000758) was produced in E. coli at Cell Signaling Technology.
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