Recombinant Human IL-18 R beta/IL-1 R7 His-tag Protein, CF
Recombinant Human IL-18 R beta/IL-1 R7 His-tag Protein, CF Summary
Product Specifications
Phe20-Arg356, with a C-terminal 6-His tag
Analysis
Product Datasheets
Carrier Free
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.
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.
11210-AP
| Formulation | Supplied as a 0.2 μm filtered solution in PBS with Trehalose. |
| Shipping | The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below. |
| Stability & Storage: | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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Scientific Data
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Measured by its ability to inhibit 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 (816-LR). The ED50 for this effect is 0.300-2.40 µg/mL in the presence of 30.0 µg/mL of soluble Recombinant Human IL-18 R alpha/IL-1 R5 Fc Chimera and 40 ng/mL of Recombinant Human IL-18/IL-1F4 Protein.
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2 μg/lane of Recombinant Human IL‑18 R beta /IL‑1 R7 His-tag Protein (Catalog # 11210-AP) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 46-61 kDa.
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.
- Born, T.L. et al. (1998) J. Biol. Chem. 273:29445.
- Okamura, H. et al. (2000) in Cytokine Reference, Vol. 2:1605, Academic Press.
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