Fagus Antibody Services


Recombinant Mouse IL-1RA/IL1RN Protein

From: £200.00

Interleukin-1 receptor antagonist protein (Il1rn), also known as IL-1ra, IRAP or IL1 inhibitor, is a member of the interleukin 1 cytokine family. This protein inhibits the activities of interleukin 1 alpha (IL1A) and interleukin 1 beta (IL1B), and modulates a variety of interleukin 1 related immune and inflammatory responses. The mouse Il1rn gene encodes a 178 amino acids (aa) protein with a 26 aa signal peptide. Mouse Il1rn protein shares 26% and 19% identity with its homologues IL-1 beta and IL-1 alpha, respectively. Il1rn can Inhibits the activity of interleukin-1 by binding to receptor IL1R1 and preventing its association with the coreceptor IL1RAP for signaling, but has no interleukin-1 like activity. Recently, an recombinant human Il1rn protein is used in the treatment of rheumatoid arthritis, an autoimmune disease in which IL-1 plays a key role.


20µg, 100µg

Active Protein

Active protein


Measure by its ability to inhibit IL-1 alpha -dependent proliferation in D10.G4.1 cells. The ED50 for this effect is <50 ng/mL.

Protein Construction

Recombinant Mouse Interleukin-1 Receptor Antagonist Protein is produced by our E.coli expression system and the target gene encoding Arg27-Gln178 is expressed.



Fusion Tag




Expressed Host



This product is provided as lyophilized powder which is shipped with ice packs.


> 95 % as determined by reducing SDS-PAGE.


< 1.0 EU per μg as determined by the LAL method.

Stability and Storage

Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.

Mol Mass

17.5 kDa

AP Mol Mass

16 kDa


Lyophilized from a 0.2 μm filtered solution of 20mM PB, 150mM NaCl, pH 7.4.

Research Areas

Please refer to the printed manual for detailed information.