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Recombinant Human Interleukin-10 (IL10)
(Cat. No.: C027)


Background:
       
Interleukin-10 is produced by murine T-cells following their stimulation by lectins. The main source for B-cell-derived Interleukin-10 in mice is Ly-1 B-cells that express CD5 and CD11. Murine keratinocytes also produce IL10.
        In humans IL-10 is produced by activated CD8 (+) peripheral blood T-cells, by T-helper CD4 (+) T-cell clones (resembling Th0, Th1, and Th2) after both antigen-specific and polyclonal activation, by B-cell lymphomas, and by monocytes following cell activation by bacterial lipopolysaccharides and mast cells. B-cell lines derived from patients with acquired immunodeficiency syndrome and Burkitt's lymphoma constitutively secrete large quantities of IL-10 into the conditioned medium. The synthesis of IL-10 by monocytes is inhibited by IL-4 and IL-10.

Description:
       
Recombinant Human IL-10 produced in E. coli is a single, non-glycosylated polypeptide chain containing 160 amino acids and having a molecular mass of 18648 Dalton.

Quality Control:
        Biological Activity:
The ED50 as determined by the dose-dependant co-stimulation with murine IL-4 of MC-9 cells was found to be < 2ng/ml, corresponding to a Specific Activity of 1.5 x 106 IU/mg.
        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 Ser-Pro-Gly-Gln-Thr.
        Endotoxin: Less than 0.1 ng/µg (IEU/µg) of rHuIL-10.

Formulation: The protein was lyophilized from a concentrated (1mg/ml) solution containing 60mM PBS pH-6.5 and 100mM NaCl.

Storage: Lyophilized rHuIL-10 although stable at room temperature for 3 weeks, should be stored desiccated below -18oC. Upon reconstitution rHuIL-10 should be stored at 4oC between 2-7 days and for future use below -18oC. For long-term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
        Please avoid freeze-thaw cycles.

Reconstitution: It is recommended to reconstitute the lyophilized rHuIL-10 in sterile 18MΩ-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.

 

 


 
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Last modified: 05/29/09