Detects human IL-1 RII in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human (rh) IL-1 RI, rhIL‑18 R, and recombinant mouse IL-18 R is observed.
Monoclonal Mouse IgG2A Clone # 32437
Protein A or G purified from ascites
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human IL‑1 RII Phe14-Glu343 (Glu297Gly) Accession # P27930
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
<0.10 EU per 1 μg of the antibody by the LAL method.
Recombinant Human IL‑1 RII (Catalog # 263-2R) under non-reducing conditions only
Immersion fixed human peripheral blood mononuclear cells
Measured by its ability to neutralize IL‑1 RII-mediated inhibition of proliferation in the D10.G4.1 mouse helper T cell line. The Neutralization Dose (ND50) is typically 2-6 µg/mL in the presence of 2 µg/mL Recombinant Human IL‑1 RII, 50 pg/mL Recombinant Human IL‑1 beta /IL‑1F2, and 1.25 µg/mL concanavalin A.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
IL‑1 RII Inhibition of IL‑1 beta /IL‑1F2‑dependent Cell Proliferation and Neutralization by Human IL‑1 RII Antibody. Recombinant Human IL‑1 RII (Catalog # 263-2R) inhibits Recombinant Human IL‑1 beta / IL‑1F2 (Catalog # 201‑LB) induced proliferation in the D10.G4.1 mouse helper T cell line in a dose-dependent manner (orange line). Inhibition of Recombinant Human IL‑1 beta /IL‑1F2 (50 pg/mL) activity elicited by Recombinant Human IL‑1 RII (2 µg/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Human IL‑1 RII Monoclonal Antibody (Catalog # MAB263). The ND50 is typically 2‑6 µg/mL in the presence of concanavalin A (1.25 µg/mL).
Preparation and Storage
Reconstitute at 0.5 mg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: IL-1 RII
Two distinct types of receptors that bind the pleiotropic cytokines IL-1 alpha and IL-1 beta have been described. The IL-1 receptor type I is an 80 kDa transmembrane protein that is expressed predominantly by T cells, fibroblasts and endothelial cells. IL-1 receptor type II is a 68 kDa transmembrane protein found on B lymphocytes, neutrophils, monocytes, large granular leukocytes and endothelial cells. Both receptors are members of the immunoglobulin superfamily and show approximately 28% sequence similarity in their extracellular domains. The two receptor types do not heterodimerize in a receptor complex.
An IL-1 receptor accessory protein that can heterodimerize with the type I receptor in the presence of IL-1 alpha or IL-1 beta but not IL-1ra, was identified (1). This type I receptor complex appears to mediate all the known IL-1 biological responses. The receptor type II has a short cytoplasmic domain and does not transduce IL-1 signals. In addition to the membrane-bound form of IL-1 RII, a naturally-occurring soluble form of IL-1 RII has been described. It has been suggested that the type II receptor, either as the membrane-bound or as the soluble form, serves as a decoy for IL-1 and inhibits IL-1 action by blocking the binding of IL-1 to the signaling type I receptor complex.
Greenfeder, S. et al. (1995) J. Biol. Chem. 270:13757.
Interleukin 1 Receptor II
Entrez Gene IDs:
7850 (Human); 16178 (Mouse)
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; interleukin 1 receptor, type II; Interleukin-1 receptor beta; MGC47725
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