IL 28B Mouse

Interleukin-28B Mouse Recombinant
Cat. No.
BT3371
Source
Escherichia Coli.
Synonyms
Interferon lambda-3, IFN-lambda-3, Interleukin-28B, IL-28B, Ifnl3, Il28, Il28b.
Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Purity
Greater than 97.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.
Usage
THE BioTeks products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

IL-28B Mouse Recombinant produced in E.coli is a single, non-glycosylated polypeptide chain containing 174 amino acids and having a molecular mass of 19.6kDa.
The IL28B is purified by proprietary chromatographic techniques.

Product Specs

Introduction
Interleukin 28B (IL-28B) belongs to the type III interferon family, which shares similarities with type I interferons and the IL-10 family. It is closely related to IL-28A and IL-29, forming a cytokine gene cluster on chromosome 19q13. Viral infections can trigger the expression of these three cytokines. IL-28B, IL-28A, and IL-29 interact with a heterodimeric receptor composed of IL-10 receptor beta (IL10RB) and IL-28 receptor alpha (IL28RA).
Description
Recombinant Mouse IL-28B, produced in E. coli, is a single polypeptide chain consisting of 174 amino acids. This non-glycosylated protein has a molecular weight of 19.6 kDa. The purification process involves proprietary chromatographic techniques.
Physical Appearance
Sterile Filtered White lyophilized powder.
Formulation
The IL-28B protein was lyophilized from a 0.2 µm filtered solution in 1xPBS, pH 7.4.
Solubility
To reconstitute the lyophilized IL-28B, it is recommended to dissolve it in sterile 18 MΩ cm H₂O to a concentration of at least 100 µg/ml. Further dilutions can be made using other aqueous solutions.
Stability
Lyophilized IL-28B can be stored at room temperature for up to 3 weeks; however, for long-term storage, it should be kept desiccated at a temperature below -18°C. Once reconstituted, IL-28B remains stable at 4°C for 2-7 days. For extended storage, it is advisable to add a carrier protein like 0.1% HSA or BSA. It is crucial to avoid repeated freeze-thaw cycles.
Purity
The purity of the protein is greater than 97.0% as determined by: (a) Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) and (b) Sodium Dodecyl Sulphate-Polyacrylamide Gel Electrophoresis (SDS-PAGE).
Biological Activity
The biological activity of the protein, represented by ED₅₀, is determined by an anti-viral assay using human HepG2 cells infected with encephalomyocarditis virus. The ED₅₀ value is less than 30 ng/ml, which corresponds to a specific activity greater than 3.3 × 10⁴ IU/mg.
Synonyms
Interferon lambda-3, IFN-lambda-3, Interleukin-28B, IL-28B, Ifnl3, Il28, Il28b.
Source
Escherichia Coli.
Amino Acid Sequence
DPVPRATRLP VEAKDCHIAQ FKSLSPKELQ AFKKAKGAIE KRLLEKDMRC SSHLISRAWD LKQLQVQERP KALQAEVALT LKVWENINDS ALTTILGQPL HTLSHIHSQL QTCTQLQATA EPKPPSRRLS RWLHRLQEAQ SKETPGCLED SVTSNLFQLL LRDLKCVASG DQCV.

Product Science Overview

Structure and Production

Recombinant mouse IL-28B is typically produced in E. coli and is a single, non-glycosylated polypeptide chain containing 174 amino acids, with a molecular mass of approximately 19.6 kDa . The recombinant protein is purified using proprietary chromatographic techniques to ensure high purity and activity .

Biological Activity

IL-28B exhibits several common features with type I interferons, including antiviral and antitumor activities . It plays a crucial role in the immune response to viral infections by inducing the expression of interferon-stimulated genes (ISGs) that inhibit viral replication. Additionally, IL-28B has been shown to have potential therapeutic applications in treating certain cancers due to its ability to modulate the immune response .

Applications

Recombinant mouse IL-28B is widely used in research to study its biological functions and potential therapeutic applications. It is often utilized in anti-viral assays to evaluate its efficacy in inhibiting viral replication in various cell lines . Moreover, it is used in studies investigating the role of IL-28B in immune modulation and its potential as a therapeutic agent in cancer treatment .

Storage and Stability

The recombinant protein is typically lyophilized from a filtered solution in PBS and can be reconstituted at a concentration of 100 μg/mL in sterile PBS . It is recommended to store the protein at -20 to -70 °C to maintain its stability and avoid repeated freeze-thaw cycles . Under sterile conditions, the reconstituted protein can be stored at 2 to 8 °C for up to one month or at -20 to -70 °C for up to three months .

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