Recombinant Human IL-39 Fc Chimera Protein, CF

Catalog # Availability Size / Price Qty
Recombinant Human IL-39 Fc Chimera Protein Bioactivity
2 Images
Product Details
Citations (2)

Recombinant Human IL-39 Fc Chimera Protein, CF Summary

Product Specifications

>90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its ability to induce IFN-gamma production by mouse splenocytes. The ED50 for this effect is 50-250 ng/mL.
Human embryonic kidney cell, HEK293-derived human IL-39 (IL-23p19/EBI3) protein
Human EBI3
(Arg21-Lys229, Gln95Cys)
Accession # Q14213
Human IL-23p19
Accession # Q9NPF7
Accession #
N-terminal Sequence
Arg21 (EBI3)
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
69 kDa
70-77 kDa, reducing conditions

Product Datasheets

You must select a language.



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.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 200 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
  • 12 months from date of receipt, ≤ -20 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, ≤ -20 °C under sterile conditions after reconstitution.

Scientific Data

Bioactivity Recombinant Human IL-39 Fc Chimera Protein Bioactivity View Larger

Recombinant Human IL-39 Fc Chimera (Catalog # 9990-IL) induces IFN-gamma production in mouse splenocytes. The ED50 for this effect is 50-250 ng/mL.

SDS-PAGE Recombinant Human IL-39 Fc Chimera Protein SDS-PAGE View Larger

2 μg/lane of Recombinant Human IL-39 was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 70-77 kDa and 140-160 kDa, respectively.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: IL-39 (IL-23p19/EBI3)

Interleukin 39 (IL-39) is a member of the IL-12 family of heterodimeric cytokines. IL-12 cytokines are composed of an alpha and beta subunit which, for IL-39 are the IL-23 p19 subunit and the EBI3 subunit, respectively (1-3). The IL-23 p19 subunit of IL-39 is synthesized as a 189 amino acid (aa) precursor protein with a 19 aa signal sequence and a 170 aa mature region. The EBI3 subunit of IL-39 is synthesized as a 229 aa precursor protein that contains a 20 aa signal sequence and a 209 aa mature region. Human and mouse IL-39 share 73% and 62% sequence homology in their IL-23 p19 and EBI3 subunits, respectively. Heterodimer (IL-39) is secreted by LPS-stimulated B cells and GL7(+) activated B cells of lupus-like mice (1, 4). IL-39 signals through IL-23 R/gp130 receptors and mediates inflammatory responses through activation of STAT1 and STAT3 in lupus-like mice (1, 2). IL‐39 induces and/or expands neutrophils in lupus‐prone mice, and IL‐39‐induced neutrophils increase the secretion of B cell activation factor (BAFF) (3). Thus, IL-39 is an important pro-inflammatory cytokine and play important roles in the pathophysiology of autoimmune diseases, including Systemic Lupus Erythematosus (SLE) (2, 4).

  1. Wang, X. et al. (2016) Eur J Immunol 46:1343.
  2. Hasegawa, H. et al. (2016) Front Immunol 7:479.
  3. Wang, X. et al. (2016) Clin Exp Immunol 186:144.
  4. Wang, X. et al. (2018) Mol Med Rep 17:1660.
Long Name
Interleukin 39 (IL-23p19/EBI3 Heterodimer)
Entrez Gene IDs
51561 (Human)
Alternate Names
IL-23 p19/EBI3; IL-23p19/EBI3; IL-39 (IL-23p19/EBI3)

Citations for Recombinant Human IL-39 Fc Chimera Protein, CF

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.

2 Citations: Showing 1 - 2
Filter your results:

Filter by:

  1. Human neutrophils activated by TLR8 agonists, with or without IFNgamma, synthesize and release EBI3, but not IL-12, IL-27, IL-35, or IL-39
    Authors: MA Cassatella, E Gardiman, F Arruda-Sil, F Bianchetto, S Gasperini, M Bugatti, W Vermi, F Larousseri, O Devergne, N Tamassia
    J. Leukoc. Biol., 2020;0(0):.
    Species: Human
    Sample Types: Cell Culture Supernates
    Applications: Reference Standard
  2. IL-39 Reduces Proliferation and Promotes Apoptosis of Bladder Cancer by Altering the Activity of Cyclin E and Fas.
    Authors: Xiao H, Alisic H, Reiman B, Deng Z, Zhu Z, Givens N, Bai Q, Tait A, Wakefield M, Fang Y
    Anticancer Res, 0;41(5):2239-2245.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay


No product specific FAQs exist for this product, however you may

View all Proteins and Enzyme FAQs

Reviews for Recombinant Human IL-39 Fc Chimera Protein, CF

There are currently no reviews for this product. Be the first to review Recombinant Human IL-39 Fc Chimera Protein, CF and earn rewards!

Have you used Recombinant Human IL-39 Fc Chimera Protein, CF?

Submit a review and receive an Amazon gift card.

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review