Human IL-18/IL-1F4 Propeptide Alexa Fluor® 647-conjugated Antibody

Catalog # Availability Size / Price Qty
IC646R-100UG
Detection of IL-18/IL-1F4 Propeptide in Human THP-1 cells by Flow Cytometry.
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Human IL-18/IL-1F4 Propeptide Alexa Fluor® 647-conjugated Antibody Summary

Species Reactivity
Human
Specificity
Detects the pro region of human IL-18/IL-1F4 in direct ELISAs and Western blots. Does not cross‑react with recombinant human IL-18, recombinant mouse IL-18 or recombinant rat IL-18.
Source
Monoclonal Mouse IgG1 Clone # 74801
Purification
Protein A or G purified from ascites
Immunogen
E. coli-derived recombinant human IL‑18/IL‑1F4
Accession # Q14116
Formulation
Supplied in a saline solution containing BSA and Sodium Azide.
Label
Alexa Fluor 647

Applications

Recommended Concentration
Sample
Intracellular Staining by Flow Cytometry
0.25-1 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.

Data Example

Intracellular Staining by Flow Cytometry Detection of IL-18/IL-1F4 Propeptide in Human THP-1 cells by Flow Cytometry. View Larger

Detection of IL-18/IL-1F4 Propeptide in Human THP-1 cells by Flow Cytometry. THP‑1 human acute monocytic leukemia cells were stained with Mouse Anti-Human IL-18/IL-1F4 Propeptide Alexa Fluor® 647-conjugated Monoclonal Antibody (Catalog # IC646R, filled histogram) or isotype control antibody (Catalog # IC002R, open histogram). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Protect from light. Do not freeze.
  • 12 months from date of receipt, 2 to 8 °C as supplied.

Background: IL-18/IL-1F4

Pro-IL-18 (pro-Interleukin 18; also pro-IGIF and pro-IL-1 gamma ) is a 24 kDa member of the IL-1 family of molecules. It is widely expressed, being produced by keratinocytes, intestinal epithelium, T cells, macrophages and osteoblasts. Human Pro-IL-18 is 193 amino acids (aa) in length. Although mature IL-18 induces IFN-gamma secretion by NK and T cells, Pro-IL-18 appears to have little intrinsic activity. Generally, active IL-18 is considered to arise from caspase-1 cleavage of Pro-IL-18 between Asp36-Tyr37. This generates an 18 kDa mature C-terminal fragment, and a 4 kDa (predicted) N-terminal prosegment that runs at 6 kDa in SDS-PAGE. Other proteases are known to process Pro-IL-18. Caspase-3 cleavage after Asp68 generates an inactive 14 kDa mature segment, Merpin beta -subunit cleavage after Asn52 generates a marginally active 17 kDa mature segment, while parasite Cys protease cleavage after Val47 generates an inactive 17 kDa mature molecule. One splice variant shows a deletion of aa 27-30. Over aa 2-36, human Pro-IL-18 shares 63% aa identity with mouse Pro-IL-18.

Long Name
Interleukin 18
Entrez Gene IDs
3606 (Human); 16173 (Mouse); 29197 (Rat); 397057 (Porcine); 574151 (Primate)
Alternate Names
Iboctadekin; IFN-gamma-inducing factor; IGIF; IGIFIL-1 gamma; IL18; IL-18; IL-18MGC12320; IL-1F4; IL1F4iboctadekin; IL-1g; Interferon gamma-inducing factor; interleukin 18 (interferon-gamma-inducing factor); Interleukin-1 gamma; interleukin-18

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