Mouse IL-12/IL-23 p40 Antibody

Recombinant Monoclonal Antibody
Catalog # Availability Size / Price Qty
IFN-gamma  Secretion Induced by IL-12 and Neutralization by Mouse IL-12/IL-23 p40 Antibody.
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Product Details
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Mouse IL-12/IL-23 p40 Antibody Summary

Species Reactivity
Detects mouse IL-12/IL-23 p40 in direct ELISAs.
Recombinant Monoclonal Rabbit IgG Clone # 2329A
Protein A or G purified from cell culture supernatant
S. frugiperda, Sf 21-derived recombinant mouse IL-12/IL-23 p40 protein
Accession # P43432
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.
Endotoxin Level
<0.10 EU per 1 μg of the antibody by the LAL method.


Recommended Concentration
Measured by its ability to neutralize IL‑12-induced IFN-gamma secretion in mouse splenocytes. The Neutralization Dose (ND50) is typically 1-10 ng/mL.

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

Neutralization IFN-gamma  Secretion Induced by IL-12 and Neutralization by Mouse IL-12/IL-23 p40 Antibody. View Larger

IFN-gamma Secretion Induced by IL-12 and Neutralization by Mouse IL-12/IL-23 p40 Antibody. Recombinant Mouse IL-12 (Catalog # 419-ML) stimulates IFN-gamma secretion in mouse splenocytes in a dose-dependent manner (orange line), as measured by the Mouse IFN-gamma Quantikine ELISA Kit (Catalog # MIF00). Under these conditions, IFN-gamma secretion elicited by Recombinant Mouse IL-12 (30 pg/mL) is neutralized (green line) by increasing concentrations of Mouse IL-12/IL-23 p40 Monoclonal Antibody (Catalog # MAB4992). The ND50 is typically 1-10 ng/mL.

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.


Preparation and Storage

Reconstitute at 0.5 mg/mL in sterile PBS.
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-12/IL-23 p40

Interleukin 12, also known as natural killer cell stimulatory factor (NKSF) or cytotoxic lymphocyte maturation factor (CLMF), is a pleiotropic cytokine originally identified in the medium of activated human B lymphoblastoid cell lines. IL-12 has multiple effects on T cells and NK cells and is a key mediator in the development of Th1 cells.

IL-12 is a heterodimeric cytokine containing two disulfide-linked subunits, p35 and p40. Human and mouse IL-12 share 70% and 60% amino acid sequence identity in their p40 and p35 subunits, respectively. Although mouse IL-12 is active on human or mouse IL-12 responsive cells, human IL-12 is not active on mouse cells.

The disulfide-linked mouse p40 homodimer can bind to IL-12 receptors and is an antagonist of IL-12 activities in vitro. The mouse p40 monomer is at least ten times less active than the homodimer as an IL-12 antagonist. At the present time, the existence and the physiological role of mouse p40 homodimer in vivo remains to be determined.

  1. Ymer, S. et al. (2002) Genes and Immunity 3:151.
Long Name
Interleukin 12/Interleukin 23 p40
Entrez Gene IDs
3593 (Human); 16160 (Mouse); 64546 (Rat); 397076 (Porcine); 403976 (Canine); 102124858 (Cynomolgus Monkey); 493741 (Feline); 694747 (Rhesus Macaque)
Alternate Names
CLMF p40; CLMF; CLMF2; Cytotoxic lymphocyte maturation factor 40 kDa subunit; IL12 p40; IL-12 p40; IL-12 subunit p40; IL12B; IL-12B; IL-12BNK cell stimulatory factor chain 2; interleukin 12, p40; interleukin 12B (natural killer cell stimulatory factor 2, cytotoxic lymphocytematuration factor 2, p40); interleukin-12 beta chain; interleukin-12 subunit beta; natural killer cell stimulatory factor, 40 kD subunit; NKSF; NKSF2; NKSF2IL12, subunit p40

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