Recombinant human Interferon Gamma protein
Growth factors from Cell Guidance Systems are high purity suitable for the most demanding applications where biological activity is required.
interferon gamma, Immune interferon, IFN-gamma, IFG, IFI, interferon gamma
The major interferon produced by mitogenically or antigenically stimulated lymphocytes. It is structurally different from type I interferon and its major activity is immunoregulation. It has been implicated in the expression of class II histocompatibility antigens in cells that do not normally produce them, leading to autoimmune disease. Interferon gamma is produced mainly by T-cells and natural killer cells activated by antigens, mitogens, or alloantigens. It is produced by lymphocytes expressing the surface antigens CD4 and CD8. The synthesis of IFN-gamma is induced, among other things, by Interleukin-2, FGF- basic, and EGF. Recombinant Human Interferon gamma produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 144 amino acids and having a molecular mass of 16879 Dalton.
Sterile Filtered white lyophilized (freeze-dried) powder.
Human IFN-gamma was lyophilized from 5 mM NaP, pH 7.2 + 50 mM NaCl.
Centrifuge vial before opening. When reconstituting the product, gently pipet and wash down the sides of the vial to ensure full recovery of the protein into solution. It is recommended to reconstitute the lyophilized product with sterile water at a concentration ranging from 0.1mg’s/ml, which can be further diluted into other aqueous solutions. Spin out slight precipitate, and use.
Lyophilized product is very stable at -20 degrees. Reconstituted material should be aliquoted and frozen at -20. It is recommended to add a carrier protein (0.1% HSA or BSA) for long term storage.
Purity Greater than 95% as determined by:
Analysis by RP-HPLC.
Reducing and non-reducing SDS-PAGE.
Protein Content determined by:
UV spectroscopy at 280 nm.
Analysis by RP-HPLC calibrated against a known standard.
Quantitation on SDS-PAGE against a known standard.
Endotoxin level as measured by LAL is <0.01ng/ug or <0.1EU/ug.
Recombinant Interferon gamma is fully biologically active when compared to standard. The specific activity as determined in a viral resistance assay is less then 0.05 ng/ml.
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