GRADE & PURITYAnimal Free?Animal-free — produced without animal-derived components to reduce contamination risk. Use in biomanufacturing and culture avoiding animal-origin material.Carrier Free?Carrier-free — supplied without added carrier protein/stabilizer. Use when carriers (e.g. BSA) would interfere with conjugation or sensitive assays.Bioactive?Bioactive grade — verified to retain biological activity in functional assays. Use when the molecule must be functionally active, not just pure.ActiBioPure™?ActiBioPure™ — Aladdin's premier line for bioactive and recombinant products. Use when both high purity and preserved biological activity are required.His Tag?His tag grade — recombinant protein bearing a His tag for affinity purification/detection. Use to purify, immobilize, or detect the tagged protein.PBS Only?PBS-only formulation — supplied in phosphate-buffered saline with no other additives. Use when you need a clean PBS buffer free of stabilizers/carriers.≥95%(SDS-PAGE)
Expression System
HEK293
Accession #
P27930
Protein Tag
C-His
Expression system
HEK293
Endotoxin Concentration
<1.0 EU/μg
Bioactivity
Immobilized Recombinant Human IL-1β Protein (rp156012) at 5.0 μg/mL can bind Recombinant Human IL-1 RII Protein (rp181605) with the EC50 of 176.8 ng/mL.
Animal Free,Carrier Free,Bioactive,ActiBioPure™,His Tag,PBS Only,≥95%(SDS-PAGE) ActiBioPure™,Animal Free,Bioactive,Carrier Free,His Tag,PBS Only for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
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Storage & shipping
Store at -20°C,Avoid repeated freezing and thawing Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.
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Quality documents
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
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Literature proof
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Overview
Protein Function: Interleukin 1 receptor, type II (IL1R2) also known as CD121b (Cluster of Differentiation 121b) is a cytokine receptor that belongs to the interleukin-1 receptor family. This protein binds interleukin alpha (IL1A), interleukin beta (IL1B), and interleukin 1 receptor, type I (IL1R1/IL1RA), and acts as a decoy receptor that inhibits the activity of its ligands. The pleiotropic cytokine IL1 is produced to regulate the development and maintenance of the inflammatory responses and binds to specific plasma membrane receptors on cells. Two distinct types of IL1 receptors that can bind IL1 specifically have been identified, designated as IL1RI (IL1RA) and IL1RII (IL1RB). IL1R1 contributes to IL-1 signaling, whereas the IL-1R2/CD121b has no signaling property and acts as a decoy for IL-1. IL-1R2/CD121b structurally consisting of a ligand-binding portion comprised of three Ig-like domains, a single transmembrane region, and a short cytoplasmic domain is expressed in a variety of cell types including B lymphocytes, neutrophils, monocytes, large granular leukocytes, and endothelial cells. Interleukin 4 (IL4) is reported to antagonize the activity of interleukin 1 by inducing the expression and release of this cytokine.
Specifications
Product Name
Recombinant Human IL-1 RII Protein
Synonyms
beta | CD121b antigen | CD121b | IL-1 R beta | IL-1 RII | IL1R2 | IL1RBCD121 antigen-like family member B | IL-1R-beta | IL1RII | IL-1RII | IL-1RT2 | IL-1RT-2 | IL-1R-2 | interleukin 1 receptor, type II | Interleukin-1 receptor beta | MGC47725
Grade
ActiBioPure™, Animal Free, Bioactive, Carrier Free, His Tag, PBS Only
Immobilized Recombinant Human IL-1β Protein (rp156012) at 5.0 μg/mL can bind Recombinant Human IL-1 RII Protein (rp181605) with the EC50 of 176.8 ng/mL.
48.4-60.9 kDa, under reducing conditions; 44.6-56.0 kDa, under non-reducing conditions
Molecule Type
Protein
Storage and Shipping
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute at 0.1 mg/mL in sterile distilled water. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.
Storage
Store at -20°C,Avoid repeated freezing and thawing
Shipped In
Ice chest + Ice pads
Stability And Storage
Store at -20°C for 1 year. Avoid freeze / thaw cycle.
Images
Recombinant Human IL-1 RII Protein (rp181605) - Binding Activity Immobilized Recombinant Human IL-1β Protein (rp156012) at 5.0 μg/mL can bind Recombinant Human IL-1 RII Protein (rp181605) with the EC
₅₀
of 176.8 ng/mL.
Recombinant Human IL-1 RII Protein (rp181605) - SDS-PAGE 3 μg/lane of Recombinant Human IL-1 RII Protein was resolved with SDS-PAGE under reducing (R) and non-reducing (N) conditions and visualized by Coomassie® Blue staining, showing a band at 48.4-60.9 kDa under reducing conditions and 44.6-56.0 kDa under non-reducing conditions.
Documentation
📋 Safety Data Sheet (SDS)
Comprehensive hazard, handling, storage, and regulatory compliance document.
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