Recombinant Human IL-18 R beta/IL-1 R7 Fc Chimera, CF

Name: Recombinant Human IL-18 R beta/IL-1 R7 Fc Chimera, CF
Brand: R&D Systems
SKU: 118-AP
Rating: 4.7 (3 reviews)

Catalog #: 118-AP 3 Reviews Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
118-AP-100

R&D Systems Recombinant Proteins and Enzymes

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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human IL-18 R beta/IL-1 R7 Fc Chimera, CF Summary

Product Specifications

Purity

>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

Activity

Measured by its ability to inhibit the IL-18-induced response of KG‑1 human acute myelogenous leukemia cells in the presence of soluble Recombinant Human IL‑18 R alpha /IL‑1 R5 Fc Chimera (Catalog # 816-LR). The ED₅₀ for this effect is 2‑6 µg/mL in the presence of 30 µg/mL of soluble IL-18 R alpha /Fc Chimera and 40 ng/mL of human IL-18.

Source

Mouse myeloma cell line, NS0-derived human IL-18 R beta/IL-1 R7 protein

Human IL-18 R beta (Phe20 - Arg356) Accession # O95256	DIEGRMD	Human IgG₁ (Pro100 - Lys330)
N-terminus		C-terminus

Accession #

O95256

N-terminal Sequence
Analysis

Phe20

Structure / Form

Disulfide-linked homodimer

Predicted Molecular Mass

65.1 kDa (monomer)

SDS-PAGE

78-93 kDa, reducing conditions

Product Datasheets

118-AP

Product Datasheet

COA

SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

118-AP

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution	Reconstitute at 100 μg/mL in sterile PBS.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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. 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Reconstitution Calculator

Background: IL-18 R beta/IL-1 R7

IL-18, originally described as an interferon-gamma inducing factor (IGIF), is a member of the IL-1 family of cytokines that has multiple immunoregulatory functions. It has potent IFN-gamma inducing activities and plays a key role in the activation of T helper type 1 (Th1) responses. The functional IL-18 receptor complex consists of two components, the IL-18 R alpha (IL-1 R5) and IL-18 R beta (also termed IL-1 R7 and AcPL) subunits. Both subunits are members of the IL-1 receptor superfamily. Although IL-18 R alpha by itself binds IL-18 with low-affinity and IL-18 R beta does not bind IL-18 in vitro, co-expression of IL-18 R alpha and IL-18 R beta is required for high-affinity binding and IL-18 responsiveness. Human IL-18 R beta cDNA encodes a 599 amino acid (aa) residue precursor type I membrane protein with a 14 aa signal peptide, a 342 aa extracellular region containing three immunoglobulin-like domains, a single transmembrane domain and a 222 aa cytoplasmic domain. Human and mouse IL-18 R beta share 65% aa sequence identity. The expression of IL-18 R beta parallels that of IL-18 R alpha and is detected in numerous tissues including lung, spleen, leukocytes and colon.

References

Born, T.L. et al. (1998) J. Biol. Chem. 273:29445.
Okamura, H. et al. (2000) in Cytokine Reference, Vol. 2:1605, Academic Press.

Long Name

Interleukin 18 Receptor beta

Entrez Gene IDs

8807 (Human); 16174 (Mouse)

Alternate Names

Accessory protein-like; AcPL; CD218 antigen-like family member B; CD218b antigen; CD218b; CDw218b; IL-1 R7; IL-18 R beta; IL-18 receptor accessory protein; IL-18 receptor beta; IL18R beta; IL-18RAcP; IL18RAP; IL18RB; IL-18Rb; IL-18Rbeta; IL-18R-beta; IL-1R accessory protein-like; IL1R7; IL-1R7; IL-1R-7; IL-1RAcPL; interleukin 18 receptor accessory protein; Interleukin-1 receptor 7; interleukin-18 receptor accessory protein; Interleukin-18 receptor accessory protein-like; Interleukin-18 receptor beta; MGC120589; MGC120590