Beschreibung
IL-1ra was originally isolated from the urine of patients with monocytic leukemia and has also been purified from adherent monocytes. The naturally-occurring, fully glycosylated form has an apparent molecular weight of about 25,000 Daltons. The protein shows 26% amino acid homology to IL-1 beta and 19% homology to IL-1 alpha. It will compete with either factor for receptor binding, but does not interact with either one. Human IL-1ra will bind to both types of IL-1 receptor (I and II) on human cells. In mouse, IL-1 RII does not bind IL-1ra. The recombinant, non-glycosylated form of IL-1ra blocks binding of IL-1 to its receptor equally as well as the naturally-occurring, glycosylated form. The IL-1ra has been shown to block the inflammatory responses induced by IL-1 both in vitro and in vivo. Pre-clinical and clinical studies were done to test possible therapeutic applications for IL-1ra in the treatment of sepsis, rheumatoid arthritis and chronic myelogenous leukemia.
Product Properties
|
Synonyms |
IL-1RN, IRAP |
|
Accession |
Q542W1 |
|
GeneID |
16181 |
|
Source |
E.coli-derived Mouse IL-1RA, Arg8-Gln159. |
|
Molecular Weight |
Approximately 17.3 kDa. |
|
AA Sequence |
RPSGKRPCKM QAFRIWDTNQ KTFYLRNNQL IAGYLQGPNI KLEEKIDMVP IDLHSVFLGI HGGKLCLSCA KSGDDIKLQL EEVNITDLSK NKEEDKRFTF IRSEKGPTTS FESAACPGWF LCTTLEADRP VSLTNTPEEP LIVTKFYFQE DQ |
|
Tag |
None |
|
Physical Appearance |
Sterile Filtered White lyophilized (freeze-dried) powder. |
|
Purity |
> 97% by SDS-PAGE and HPLC analyses. |
|
Biological Activity |
The ED50 as determined by inhibiting IL-1α-dependent proliferation of murine D10S cells is less than 50 ng/mL, corresponding to a specific activity of > 2.0 × 104 IU/mg in the presence of 50 pg/mL rHuIL-1α. Fully biologically active when compared to standard. |
|
Endotoxin |
< 1.0 EU per 1 μg of the protein by the LAL method. |
|
Formulation |
Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4. |
|
Reconstitution |
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20°C. Further dilutions should be made in appropriate buffered solutions. |
Shipping and Storage
The products are shipped with ice pack and can be stored at -20℃ to -80℃ for 1 year.
Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles.
Cautions
1. Avoid repeated freeze-thaw cycles.
2. For your safety and health, please wear lab coats and disposable gloves for operation.
3. For research use only!
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FAQ
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