Human/Canine IL-23 p19 Antibody

Catalog # Availability Size / Price Qty
Detection of Human and Canine IL‑23 p19 by Western Blot.
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Product Details
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Human/Canine IL-23 p19 Antibody Summary

Species Reactivity
Human, Canine
Detects human and canine IL-23 p19 in direct ELISAs and Western blots. In direct ELISAs, approximately 60% cross-reactivity with recombinant feline IL-23 p19 is observed and approximately 40% cross-reactivity with recombinant mouse IL-23 p19 is observed.
Polyclonal Sheep IgG
Antigen Affinity-purified
E. coli-derived recombinant canine IL-23 p19
Accession # XP_538231
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
0.5 µg/mL
See below

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 and Canine IL-23 p19 antibody by Western Blot. View Larger

Detection of Human and Canine IL‑23 p19 by Western Blot. Western blot shows lysates of human mature dendritic cells (LPS activated), CLL-1390 canine leukocytic round cell neoplasia cell line, and THP-1 human acute monocytic leukemia cell line. PVDF Membrane was probed with 0.5 µg/mL of Sheep Anti-Canine IL-23 p19 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6250) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for IL-23 p19 at approximately 26-28 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 8.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Sterile PBS to a final concentration of 0.2 mg/mL.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
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

IL-23 p19 (Interleukin 23 p19; also IL-23 alpha) is an 18-20 kDa (estimated) member of the IL-6 superfamily of molecules. It is disulfide-bonded to p40 to form IL-23. IL-23 is secreted by immune-related cell types such as keratinocytes, dendritic cells, macrophages, microglia and monocytes, often following TLR stimulation. It appears to drive Th17 cell development by inhibiting T-bet and FoxP3 production, and to reduce IL-12-mediated IFN-gamma production by CD4+, CD8+ and NK cells. Based on human, mature canine IL-23 p19 is 171 amino acids (aa) in length. It is a alpha -helical molecule that utilizes Cys77 to form an interchain disulfide bond with IL-12 p40. IL-23 p19 does not appear to be released unless dimerized to p40. There are no potential N-linked glycosylation sites on p19. Mature canine IL-23 p19 (aa 23-193) shares 88% aa identity with human IL-23 p19.

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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