Human IL-1 RII / CD121b Protein

• Catalog Number: orb257592
• Category: Proteins
• Description: Interleukin-1 receptor type 2 (IL1R2) is also known as CD121 antigen-like family member B (CDw121b), IL-1 type II receptor, Interleukin-1 receptor type II, belongs to the interleukin-1 receptor family. Two distinct types of IL1 receptors which are able to bind IL1 specifically have been identified, designated as IL1RI (IL1RA) and IL1RII (IL1RB). IL1R2 is non-signaling receptor for IL1A, IL1B and IL1RN, reduces IL1B activities. Serves as a decoy receptor by competetive binding to IL1B and preventing its binding to IL1R1. IL1R2 modulates cellular response through non-signaling association with IL1RAP after binding to IL1B. IL1R2 (membrane and secreted forms) preferentially binds IL1B and poorly IL1A and IL1RN. The secreted IL1R2 recruits secreted IL1RAP with high affinity; this complex formation may be the dominant mechanism for neutralization of IL1B by secreted/soluble receptors.
• Reactivity: Human
• Tag: C-Fc
• Form/Appearance: Powder
• Purity: 95%
• Conjugation: Unconjugated
• MW: 63.9 kDa
• Target: IL-1 RII
• Source: Human IL-1 RII, Fc Tag (orb257592) is expressed from human 293 cells (HEK293). It contains AA Phe 14 - Glu 343 (Accession # NP_004624.1).
• Expression System: HEK293
• Biological Activity: Human IL-1 RII, Fc Tag captured on CM5 chip via anti-human IgG Fc antibodies surface can bind Human IL-1 beta, premium grade with an affinity constant of 0.622 nM as determined in a SPR assay (Biacore T200) (Routinely tested).
• Expression Region: Phe 14 - Glu 343
• Endotoxins: 1.0 EU per μg
• NCBI: NP_004624.1
• Storage: -20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution. For long term storage, the product should be stored at lyophilized state at -20°C or lower.
• Buffer/Preservatives: 50 mM Tris, 100 mM Glycine, pH7.5
• Alternative names: CD121b,IL1RB,IL1R2,CDw121b
• Note: For research use only
• Application notes: This protein carries a human IgG1 Fc tag at the C-terminus. The protein has a calculated MW of 63.9 kDa. The protein migrates as 70-85 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
• Expiration Date: 6 months from date of receipt.

SDS-PAGE analysis of Human IL-1 RII protein

Line graph illustrates about the sensitivity range of Human IL-1 RII protein using different concentrations

Human IL-1 RII, Fc Tag (Cat. No. orb257592) captured on CM5 chip via anti-human IgG Fc antibodies surface can bind Human IL-1 beta, premium grade (Cat. No. orb257615) with an affinity constant of 0.622 nM as determined in a SPR assay (Biacore T200) (Routinely tested).