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Recombinant Mouse G-CSF (CSF3)

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Product Source Size Cat. No. Price
Recombinant Mouse G-CSF (CSF3) E. coli10 µg Z200605 $70.00
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Data Sheet
Print Version
Alternative Names Granulocyte colony-stimulating factor
Description Granulocyte colony-stimulating factor (G-CSF) is a growth factor and cytokine belonging to the IL-6 family of interleukins. It is produced by a variety of cells such as: endothelial cells, bone marrow stroma, macrophages, fibroblasts, and other immune cells in response to endotoxin activation. G-CSF stimulates the bone marrow to stimulate the survival, proliferation and differentiation of progenitor cells to mature neutrophils while enhancing its activities. It indirectly mobilizes stem cells by downregulating the expression of CXCL12 on marrow osteoblasts and releases neutrophil and monocyte proteolytic enzymes. Mouse G-CSF affects mouse skeletal muscle development by activating proliferation of myoblasts. Human and murine G-CSF shares a 73% amino acid identity and is cross-reactive.
Gene Symbol CSF3
Gene ID 12985
Accession No. P09920
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 19.2 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method
Purity >95% as determined by SDS-PAGE
Bioactivity The ED50 was 10.0-60.0 pg/mL as determined by a cell proliferation assay
Formulation Lyophilized from a 0.2 µm filtered solution in PBS
Reconstitution Reconstitute in sterile deionized water at 100 µg/mL
Storage The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.
Usage For research use only. Not for diagnostic or therapeutic use.
Product Documents
Product References
FAQs
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How are endotoxin levels measured?
1. For estimating the endotoxin levels; we use the LAL (Limulus Amebocyte Lysate) method: The lysate from horseshoe crab amebocytes clots in the presence of very low endotoxin. This reaction is the basis of the Limulus amebocyte lysate (LAL) assay which was approved by the FDA in 1970.

· Endotoxin is generally measured in Endotoxin Units per milliliter (EU/mL).

· For recombinant proteins: EU is reported per microgram of protein.

· One EU = 0.1-0.2 ng endotoxin/µg of protein.

· At abm, we do the LAL chromogenic assays that can detect down to 0.01 EU/ml.
With regard to the BSA levels in some Growth Factors and Cytokines, can you please provide an explanation as to why they are so high?
The amount of BSA, as part of the formulation of a protein, can vary considerably depending on how much BSA was deemed optimum/necessary for protein stability in combination with /in-lieu of - other possible additives. The aforementioned formulations are somewhat analogous to the “carrier” versions of many formulations from “R and D systems” that have as high as 50 µg of BSA per µg of the recombinant protein product. If, needed or desired, abm scientists can substitute BSA for other stabilizing additives for most formulations.
Are your Escherichia coli sourced growth factors: 1) Human derived materials free? 2) Recombinant proteins free?
Yes, all of abm's growth factors made in Escherichia coli using recombinant technology contain no human derived-products or other recombinant proteins. In the rare cases of BSA presence, this will be mentioned in the product's formulation.