Human IL-28B/IFN-lambda 3 Antibody

Catalog #: MAB52593 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
MAB52593-100
MAB52593-SP

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Summary Preparation and Storage Reconstitution Calculator Background Product Datasheets Related Research Areas

Human IL-28B/IFN-lambda 3 Antibody Summary

Species Reactivity

Human

Specificity

Detects human IL-28B/IFN‑ lambda 3 in direct ELISAs.

Source

Monoclonal Mouse IgG_2A Clone # 567108

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

Chinese hamster ovary cell line CHO-derived recombinant human IL‑28B/IFN‑ lambda 3
Arg30-Val200 (Lys74Arg)
Accession # Q81Z19

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Label

Unconjugated

Applications

Recommended Concentration

Sample

ELISA

This antibody functions as an ELISA capture antibody when paired with Mouse Anti-Human IL‑28B/IFN‑ lambda 3 Monoclonal Antibody (Catalog # MAB52591), Mouse Anti-Human IL‑28B/IFN‑ lambda 3 Monoclonal Antibody (Catalog # MAB52591R) or Mouse Anti-Human IL‑28B/IFN‑ lambda 3 Monoclonal Antibody (Catalog # MAB52594).

This product is intended for assay development on various assay platforms requiring antibody pairs.

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.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store 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.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: IL-28B/IFN-lambda 3

IL-28B (also named interferon-lambda 3, IFN-lambda 3), IL-28A (IFN-lambda 2) and IL-29 (IFN-lambda 1) are type III interferons that are class II cytokine receptor ligands (1‑4). They are distantly related to members of the IL-10 family and type I IFN family (1‑4). Human IL-28B cDNA encodes a 200 amino acid (aa) protein with a 25 aa signal peptide and a 175 aa mature protein that lacks N-glycosylation sites. Mature human IL-28B shares 64% and 75% aa sequence identity with mouse and canine IL-28B, respectively, and is active across species (5). Human IL-28B shares 94% and 69% aa identity with human IL-28A and IL-29, respectively (4). Type III interferons are widely expressed, but are mainly produced by antigen presenting cells in response to viruses and double-stranded RNA that interact with Toll-like receptors or RIG-1 family helicases (2‑6). They signal through a widely expressed receptor that is a heterodimer of the IL-10 receptor beta (IL-10 R beta ) and IL-28 receptor alpha (IL-28 R alpha ; also called IFN-lambda R1) (2, 3, 7, 9). Interaction of either type I or type III IFNs with their receptors activates similar pathways, including JAK tyrosine kinase activation, STAT phosphorylation and formation of the IFN-stimulated regulatory factor 3 (ISGF-3) transcription factor complex (1‑3). Both type I and III IFNs induce anti-viral activity and upregulate MHC class I antigen expression (2‑6). Cell lines responsive to type III IFNs are also responsive to type I IFNs, but in general, higher concentrations of type III IFNs are needed for similar in vitro responses (8). In vivo, however, type III IFNs enhance levels of IFN-gamma in serum, suggesting that the robust anti-viral activity of type III IFNs may stem in part from activation of the immune system (5, 7). Anti-proliferative and antitumor activity in vivo has also been shown for type III IFNs (9‑11).

References