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Recombinant Human IL27

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Product Source Size Cat. No. Price
Recombinant Human IL27 CHO cells100 µg Z101275 $2,900.00
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Data Sheet
Print Version
Alternative Names Interleukin-27 subunit alpha, IL-27 subunit alpha, IL-27-A, IL27-A, p28
Recombinant Human Interleukin-27 (IL27)
Description IL-27 is a cytokine with pro- and anti-inflammatory properties, that can regulate T helper cell development, suppress T cell proliferation, stimulate cytotoxic T cell activity, induce isotype switching in B cells, and that has diverse effects on innate immune cells. Among its target cells are CD4 T helper cells which can differentiate in type 1 effector cells (TH1), type 2 effector cells (TH2) and IL-17 producing helper T cells (TH17). It drives rapid clonal expansion of naive but not memory CD4 T cells. It also strongly synergizes with IL-12 to trigger interferon-gamma/IFN-gamma production of naive CD4 T cells, binds to the cytokine receptor WSX-1/TCCR. Another important role of IL-27 is its antitumor activity as well as its antiangiogenic activity with activation of production of antiangiogenic chemokines.
Gene Symbol IL27
Gene ID 246778
Accession No. Q8NEV9
Source CHO cells
Appearance Lyophilized Powder
Molecular Weight 50.0 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 activity was determined by its ability to bind recombinant human IL-27RA with a linear range of 60-1000 ng/mL in functional ELISA.
Formulation Recombinant Human Interleukin-27 was lyophilized from a 0.2 μm filtered PBS solution pH 7.4.
Reconstitution A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
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.