Detects human IL‑28A/IFN‑ lambda 2 in direct ELISAs. In direct ELISAs, 83% cross-reactivity with recombinant human (rh) IL-28B/IFN-lambda 3 and no cross-reactivity with recombinant mouse IL-28B/IFN-lambda 3 or rhIL-29/IFN-l1 is observed.
Monoclonal Mouse IgG1 Clone # 248526
Protein A or G purified from hybridoma culture supernatant
Mouse myeloma cell line NS0-derived recombinant human IL‑28A/IFN‑ lambda 2 Val26-Val200 Accession # Q8IZJ0
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.
Measured by its ability to neutralize IL‑28A/IFN‑ lambda 2 inhibition of EMCV-induced cytopathy in the HepG2 human hepatocellular carcinoma cell line. Sheppard, P. et al. (2003) Nat. Immunol. 4:63. The Neutralization Dose (ND50) is typically 0.25-1.0 µg/mL in the presence of 0.1 µg/mL Recombinant Human IL‑28A/IFN‑ lambda 2.
Please Note: Optimal dilutions should be determined by each laboratory for each application.
are available in the Technical Information section on our website.
IL‑28A/IFN‑ lambda 2 Inhibition of EMCV‑induced Cytopathy and Neutralization by Human IL‑28A/IFN‑ lambda 2 Antibody.
Recombinant Human IL‑28A/IFN‑ lambda 2 (Catalog # 1587‑IL) reduces the Encephalomyocarditis Virus (EMCV)-induced cytopathy in the HepG2 human hepatocellular carcinoma cell line in a dose-dependent manner (orange line). Inhibition of EMCV activity elicited by Recombinant Human IL‑28A/IFN‑ lambda 2 (0.1 µg/mL) is neutralized (green line) by increasing concentrations of Mouse Anti‑Human IL‑28A/IFN‑ lambda 2 Monoclonal Antibody (Catalog # MAB1587). The ND50 is typically 0.25‑1.0 µg/mL.
Preparation and Storage
Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
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-28A/IFN-lambda 2
IL-28A, IL-28B, and IL-29, also named interferon-lambda 2 (IFN-lambda 2), IFN-lambda 3, and IFN-lambda 1, respectively, are class II cytokine receptor ligands that are distantly related to members of the IL-10 family (11‑13% aa sequence identity) and type I IFN family (15‑19% aa sequence identity) (1‑3). The expression of IL-28A, B, and IL-29 is induced by virus infection or double-stranded RNA. All three cytokines exert bioactivities that overlap those of type I IFNs, including antiviral activity and up‑regulation of MHC class I antigen expression. The three proteins signal through the same heterodimeric receptor complex that is composed of the IL‑10 receptor beta (IL‑10 R beta ) and a novel IL‑28 receptor alpha (IL‑28 R alpha, also known as IFN-lambda R1). Ligand binding to the receptor complex induces Jak kinase activation and STAT1 and STAT2 tyrosine phosphorylation. The phosphorylated STAT1 and STAT2 complex with IFN-regulatory factor 9 (IRF-9) to form the IFN-stimulated regulatory factor 3 (ISGF-3) transcription factor complex that is translocated to the nucleus. ISGF-3 binds to the IFN-stimulated response element (ISRE) present in the regulatory regions of the target genes. Human IL-28A cDNA encodes a 200 amino acid (aa) residue precursor protein with a 25 aa signal peptide. It shares 94% and 67% aa sequence identity with human IL-28B and human IL-29, respectively.
R&D Systems personnel manually curate a database that contains references using R&D Systems products.
The data collected includes not only links to publications in PubMed,
but also provides information about sample types, species, and experimental conditions.
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