Human IL-12/IL-35 p35 Antibody

Recombinant Monoclonal Antibody
Catalog # Availability Size / Price Qty
Detection of IL‑12/IL‑35 p35 in Human PBMCs treated with rhIFN-  gamma  and LPS by Flow Cytometry.
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Human IL-12/IL-35 p35 Antibody Summary

Species Reactivity
Detects human IL-12/IL-35 p35 in direct ELISAs. Detects the IL-12/IL-35 p35 subunit either as part of the IL-12 p40/p35 heterodimer or as the IL-12/IL-35 p35 monomer. This antibody does not detect the IL-12/IL-23 p40 subunit.
Recombinant Monoclonal Rabbit IgG Clone # 2038C
Protein A or G purified from cell culture supernatant
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human IL-12 p40 and human IL-12 p35
Ile23-Ser328 of p40, Arg23-Ser219 of p35
Accession # P29460 (p40) & P29459 (P35)
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
8-25 µg/mL
See below
Intracellular Staining by Flow Cytometry
0.25 µg/106 cells
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

Intracellular Staining by Flow Cytometry Detection of IL-12/IL-35 p35 antibody in Human PBMCs treated with rhIFN- ? and LPS antibody by Flow Cytometry. View Larger

Detection of IL‑12/IL‑35 p35 in Human PBMCs treated with rhIFN- gamma and LPS by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs), A) treated with recombinant human IFN- gamma (Catalog # 285-IF, 75 ng/mL for 2 hours), then LPS (1 µg/mL for 12 hours) and lastly monensin (3 µM for 3 hours), or B) untreated, were stained with Mouse Anti-Human CD14 PE-conjugated Monoclonal Antibody (Catalog # FAB3832P) and Rabbit Anti-Human IL-12/IL-35 p35 Monoclonal Antibody (Catalog # MAB15701) followed by APC-conjugated Goat Anti-Rabbit Secondary Antibody (Catalog # F0111). Quadrant markers were set based on isotype control antibody (Catalog # MAB1050, data not shown). To facilitate intracellular staining, cells were fixed and permeabilized with FlowX FoxP3 Fixation & Permeabilization Buffer Kit (Catalog # FC012). View our protocol for Staining Intracellular Molecules.

Immunocytochemistry IL-12/IL-35 p35 antibody in Human PBMCs by Immunocytochemistry (ICC). View Larger

IL‑12/IL‑35 p35 in Human PBMCs. IL-12/IL-35 p35 was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) using Rabbit Anti-Human IL-12/IL-35 p35 Monoclonal Antibody (Catalog # MAB15701) at 8 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Rabbit IgG Secondary Antibody (red; Catalog # NL004) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.

Reconstitution Calculator

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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-35 p35

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. The p40 subunit of IL-12 has been shown to have extensive amino acid sequence homology to the extracellular domain of the human IL-6 receptor while the p35 subunit shows distant but significant sequence similarity to IL-6, G-CSF, and chicken MGF. These observations have led to the suggestion that IL-12 might have evolved from a cytokine/soluble receptor complex. Human and murine IL-12 share 70% and 60% amino acid sequence homology in their p40 and p35 subunits, respectively. IL-12 apparently shows species specificity with human IL-12 reportedly showing minimal activity in the murine system.

IL-12 is produced by macrophages and B lymphocytes and has been shown to have multiple effects on T cells and natural killer (NK) cells. These effects include inducing production of IFN-gamma and TNF by resting and activated T and NK cells, synergizing with other IFN-gamma  inducers at both the transcriptional and post-transcriptional levels. This interaction induces IFN-gamma  gene expression, enhancing the cytotoxic activity of resting NK and T cells, inducing and synergizing with IL-2 in the generation of lymphokine-activated killer (LAK) cells, acting as a co-mitogen to stimulate proliferation of resting T cells, and inducing proliferation of activated T and NK cells. Current evidence indicates that IL‑12, produced by macrophages in response to infectious agents, is a central mediator of the cell‑mediated immune response by its actions on the development, proliferation, and activities of TH1 cells. In its role as the initiator of cell-mediated immunity, it has been suggested that IL-12 has therapeutic potential as a stimulator of cell-mediated immune responses to microbial pathogens, metastatic cancers, and viral infections such as AIDS.

Long Name
Interleukin 12 p35
Entrez Gene IDs
3592 (Human); 16159 (Mouse); 84405 (Rat)
Alternate Names
CLMF;IL12A;IL-12A;IL-12p35;Ll12a;NFSK;NKSF1;P35; IL-12/IL-35 p35; IL-12A; IL35p35

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