Human IL-23 p19 Antibody

Catalog # Availability Size / Price Qty
Detection of Human IL‑23 p19 by Western Blot.
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Product Details
Citations (3)
Supplemental Products
Reviews (1)

Human IL-23 p19 Antibody Summary

Species Reactivity
Detects human IL-23 p19 in direct ELISAs and Western blots. In direct ELISAs, approximately 50% cross-reactivity with recombinant human (rh) IL-23 heterodimer is observed, less than 10% cross-reactivity with recombinant mouse (rm) IL-23 heterodimer is observed, and no cross-reactivity with recombinant feline IL-23 p19, recombinant canine (rca) IL-23 p19, and recombinant rat IL-23 p19 is observed.. In Western blots, no cross-reactivity with rcaIL-23 p19 or rmIL-23 p19 is observed.
Monoclonal Mouse IgG2B Clone # 727753
Protein A or G purified from hybridoma culture supernatant
E. coli-derived recombinant human IL-23 p19
Accession # Q9NPF7
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.


Recommended Concentration
Western Blot
1 µg/mL
See below

This antibody functions as an ELISA capture antibody when paired with Mouse Anti-Human EBI3 Monoclonal Antibody (Catalog # MAB64561).

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.

Scientific Data

Western Blot Detection of Human IL-23 p19 antibody by Western Blot. View Larger

Detection of Human IL‑23 p19 by Western Blot. Western blot shows lysates of CHO Chinese hamster ovary cell line transfected with human IL-23. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human IL-23 p19 Monoclonal Antibody (Catalog # MAB17161) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for IL-23 p19 at approximately 21 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Human IL‑39 ELISA Standard Curve. Recombinant Human IL‑39 protein was serially diluted 2-fold and captured by Mouse Anti-Human IL‑23 p19 Monoclonal Antibody (Catalog # MAB17161) coated on a Clear Polystyrene Microplate (DY990). Mouse Anti-Human EBI3 Monoclonal Antibody (MAB64561) was biotinylated and incubated with the protein captured on the plate. Detection of the standard curve was achieved by incubating Streptavidin-HRP (DY998) followed by Substrate Solution (DY999) and stopping the enzymatic reaction with Stop Solution (DY994).

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Preparation and Storage

Sterile PBS to a final concentration of 0.5 mg/mL.
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-23

Interleukin 23 (IL-23) is a heterodimeric cytokine composed of two disulfide-linked subunits, a p19 subunit that is unique to IL-23, and a p40 subunit that is shared with IL-12 (1‑5). The p19 subunit has homology to the p35 subunit of IL-12, as well as to other single chain cytokines such as IL-6 and IL-11. The p40 subunit is homologous to the extracellular domains of the hematopoietic cytokine receptors. Human and mouse p19 share 70% aa sequence identity. Although p19 is expressed by activated macrophages, dendritic cells, T cells, and endothelial cells, only activated macrophages and dendritic cells express p40 concurrently to produce IL-23. The functional IL-23 receptor complex consists of two receptor subunits, the IL-12 receptor beta 1 subunit (IL-12 R beta 1) and the IL-23-specific receptor subunit (IL-23 R). IL-23 has biological activities that are similar to, but distinct from IL-12. Both IL-12 and IL-23 induce proliferation and IFN-gamma production by human T cells. While IL-12 acts on both naïve and memory human T cells, the effects of IL-23 is restricted to memory T cells. In mouse, IL-23 but not IL-12, has also been shown to induce memory T cells to secret IL-17, a potent proinflammatory cytokine. IL-12 and IL-23 can induce IL-12 production from mouse splenic DC of both the CD8- and CD8+ subtypes, however only IL-23 can act directly on CD8+ DC to mediate immunogenic presentation of poorly immunogenic tumor/self peptide.

  1. Oppmann, B. et al. (2000) Immunity 13:715.
  2. Lankford, C.S. and D.M. Frucht (2003) J. Leukoc. Biol. 73:49.
  3. Parham, C. et al. (2002) J. Immunol. 168:5699.
  4. Belladonna, M.L. et al. (2002) J. Immunol. 168:5448.
  5. Aggarwal, S. et al. (2003) J. Biol. Chem. 278:1910.
Long Name
Interleukin 23
Entrez Gene IDs
51561 (Human); 83430 (Mouse); 155140 (Rat); 102128555 (Cynomolgus Monkey)
Alternate Names
IL-23 p19/IL-12 p40; IL23; IL-23; IL-23A; IL-23-A; IL-23p19; IL-23p19/IL-12p40; IL23P19P19; interleukin 23 p19 subunit; interleukin 23, alpha subunit p19; interleukin-23 subunit alpha; Interleukin-23 subunit p19; JKA3 induced upon T-cell activation; MGC79388; SGRF; SGRFIL-23 subunit alpha

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Citations for Human IL-23 p19 Antibody

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.

3 Citations: Showing 1 - 3
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  1. Inherited PD-1 deficiency underlies tuberculosis and autoimmunity in a child
    Authors: M Ogishi, R Yang, C Aytekin, D Langlais, M Bourgey, T Khan, FA Ali, M Rahman, OM Delmonte, M Chrabieh, P Zhang, C Gruber, SJ Pelham, AN Spaan, J Rosain, WT Lei, S Drutman, MD Hellmann, MK Callahan, M Adamow, P Wong, JD Wolchok, G Rao, CS Ma, Y Nakajima, T Yaguchi, K Chamoto, SC Williams, JF Emile, F Rozenberg, MS Glickman, F Rapaport, G Kerner, G Allington, I Tezcan, D Cagdas, FO Hosnut, F Dogu, A Ikinciogul, VK Rao, L Kainulaine, V Béziat, J Bustamante, S Vilarinho, RP Lifton, B Boisson, L Abel, D Bogunovic, N Marr, LD Notarangel, SG Tangye, T Honjo, P Gros, S Boisson-Du, JL Casanova
    Nature Medicine, 2021-06-28;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry
  2. Monocyte-derived dendritic cells from Crohn's disease patients exhibit decreased ability to activate T helper type 17 responses in memory cells.
    Authors: Nieminen J, Sipponen T, Farkkila M, Vaarala O
    Clin Exp Immunol, 2014-07-01;177(1):190-202.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry
  3. Induction and activation of human Th17 by targeting antigens to dendritic cells via dectin-1.
    Authors: Duluc D, Joo H, Ni L, Yin W, Upchurch K, Li D, Xue Y, Klucar P, Zurawski S, Zurawski G, Oh S
    J Immunol, 2014-05-16;192(12):5776-88.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry, Functional Assay


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Human IL-23 p19 Antibody
By Anonymous on 10/27/2017
Application: ELISA Sample Tested: AGS human gastric adenocarcinoma cell line Species: Human