Product Specifications for Recombinant Human G-CSF Protein
E. coli-derived human G-CSF protein Thr31-Pro204, with an N-terminal Met
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
17-19 kDa, reducing conditions
Measured in a cell proliferation assay using NFS‑60 mouse myelogenous leukemia lymphoblast cells. Shirafuji, N.et al. (1989) Exp. Hematol. 17:116. The ED50 for this effect is 10-60 pg/mL.
Scientific Data Examples for Recombinant Human G-CSF Protein
Recombinant Human G-CSF Protein Bioactivity
Recombinant Human G-CSF (Catalog # 214-CS) stimulates cell proliferation of the NFS-60 mouse myelogenous leukemia lymphoblast cell line. The ED50 for this effect is 10-60 pg/mL.
Recombinant Human G-CSF Protein SDS-PAGE
1 μg/lane of Recombinant Human G-CSF was resolved with SDS-PAGE under reducing (R) conditions and visualized by silver staining, showing a single band at 18.5 kDa.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant
protein to be stored at a more dilute concentration.
The carrier free version does not contain BSA.
Lyophilized from a 0.2 μm filtered solution in Acetic Acid with BSA as a carrier protein.
Reconstitute at 50 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Supplied as a 0.2 μm filtered solution in Acetic Acid.
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
Do not freeze.Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
6 months from date of receipt, 2 to 8 °C as supplied.
G-CSF is a pleiotropic cytokine best known for its specific effects on the proliferation, differentiation, and activation of hematopoietic cells of the neutrophilic granulocyte lineage. It is produced mainly by monocytes and macrophages upon activation by endotoxin, TNF-alpha and IFN-gamma. Other cell types including fibroblasts, endothelial cells, astrocytes and bone marrow stromal cells can also secrete G-CSF after LPS, IL-1 or TNF-alpha activation. In addition, various carcinoma cell lines and myeloblastic leukemia cells can express G-CSF constitutively.
In humans, two distinct cDNA clones for G-CSF, encoding 207 and 204 amino acid precursor proteins, have been isolated. Both proteins have a 30 amino acid signal peptide and have identical amino acid sequences except for a three amino acid insertion (deletion) at the 35th amino acid residue from the N-terminus of the mature protein. Human G-CSF is 73% identical at the amino acid level to murine G-CSF and the two proteins show species cross-reactivity.
In vitro, G-CSF stimulates growth, differentiation and functions of cells from the neutrophil lineage. It also has blast cell growth factor activity and can synergize with IL-3 to shorten the Go period of early hematopoietic progenitors. Consistent with its in vitro functions, G-CSF has been found to play important roles in defense against infection, in inflammation and repair, and in the maintenance of steady state hematopoiesis.
Which Brands are Currently Available on bio‑techne.com? R&D Systems, Tocris Bioscience and ProteinSimple branded products are available to purchase through bio‑techne.com. ProteinSimple branded instruments are available to quote. ACD branded products will be available on bio‑techne.com in the near future. Novus Biologicals branded products are not currently available on bio‑techne.com and can be found at novusbio.com.
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