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Product Details
Synonyms
CD121b, IL1RB, IL1R2, CDw121b
Source
Human IL-1 RII, Fc Tag (IL2-H4256) is expressed from human 293 cells (HEK293). It contains AA Phe 14 - Glu 343 (Accession # NP_004624.1).
Predicted N-terminus: Phe 14
Request for sequenceMolecular Characterization
Other Tags and Version Biotin & Other Labeled Version
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 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
Endotoxin
Less than 1.0 EU per μg by the LAL method / rFC method.
Purity
>90% as determined by SDS-PAGE.
Formulation
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 150 mM NaCl, pH7.5 with trehalose as protectant.
Contact us for customized product form or formulation.
Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
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Data Display
SDS-PAGE
Human IL-1 RII, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90% (With Star Ribbon Pre-stained Protein Marker).
Bioactivity-ELISA
Immobilized Human IL-1 beta, premium grade (Cat. No. ILB-H4110) at 10 μg/mL (100 μL/well) can bind Human IL-1 RII, Fc Tag (Cat. No. IL2-H4256) with a linear range of 4-63 ng/mL (QC tested).
Protocol
Bioactivity-SPR
Human IL-1 RII, Fc Tag (Cat. No. IL2-H4256) captured on CM5 chip via anti-human IgG Fc antibodies surface can bind Human IL-1 beta, premium grade (Cat. No. ILB-H4110) with an affinity constant of 0.622 nM as determined in a SPR assay (Biacore T200) (Routinely tested).
Protocol
Human IL-1 RII, Fc Tag (Cat. No. IL2-H4256) captured on CM5 chip via Anti-human IgG Fc antibodies surface can bind Human IL-1 beta, His Tag (Cat. No. ILB-H51H3) with an affinity constant of 0.571 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
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