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詳情介紹

CYT-206

重組人干擾素-γ（rHuIFN-γ）

20μg/100μg/1mg

Prospec

Background:
	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 .
	Description :
	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. Recombinant IFN-gamma is purified by proprietary chromatographic techniques.
	Physical Appearance:
	Sterile Filtered White lyophilized （freeze-dried） powder.
	Formulation:
	IFN-g was lyophilized after extensive dialysis from a concentrated （1mg/ml） solution in 10mM sodium Phosphate buffer pH=7.4±0.1.
	Solubility:
	It is recommended to reconstitute the lyophilized rHuIFN&gamma in sterile 18MΩ-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
	Stability:
	Lyophilized IFN-g although stable at room temperature for 3 weeks, should be stored desiccated below -18 C. Upon reconstitution IFN-g should be stored at 4 C between 2-7 days and for future use below -18 C. For long term storage it is recommended to add a carrier protein （0.1% HSA or BSA）. Please avoid freeze-thaw cycles.
	Purity:
	Greater than 98.0% as determined by: （a） Analysis by RP-HPLC. （b） Anion-exchange FPLC. （c） Analysis by reducing and non-reducing SDS-PAGE Silver Stained gel.
	Amino acid sequence:
	The sequence of the first five N-terminal amino acids was determined and was found to be Met-Gln-Asp-Pro-Tyr.
	Dimers and aggregates:
	Less than 1% as determined by silver-stained SDS-PAGE gel analysis.
	Biological Activity:
	ProSpec's Recombianant 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, corresponding to a specific activity of 2.0 x 10⁷ IU/ mg.
	Endotoxin:
	Less than 0.1 ng/µg （IEU/µg） of IFN-gamma.
	Protein content:
	Protein quantitation was carried out by two independent methods: 1. UV spectroscopy at 280 nm using the absorbency value of 0.640 as the extinction coefficient for a 0.1% （1mg/ml） solution. This value is calculated by the PC GENE computer analysis program of protein sequences （InliGenetics）. 2. Analysis by RP-HPLC, using a standard solution of IFN-gamma as a Reference Standard.
	Usage:
	Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.