168265
IL-18 (Iboctadekin, IFN gamma inducing factor, IGIF, IL 1 gamma, IL 18, IL 1g, IL-1F4, IL 18, Interleukin 18, IL18, Interleukin18, IL1 F4, IL1F4)
Size
£1,041.00
- SKU:
- 168265
- Purity:
- Purified by Protein A affinity chromatography.
- Storage Conditions:
- -20°C
- Supplier:
- United States Biological
- Host:
- Rabbit
- Immunogen:
- Recombinant protein corresponding to 157aa from mouse IL-18 expressed in E.coli.
- Format:
- Supplied as a liquid in 0.02M potassium phosphate, 0.15M sodium chloride, pH 7.2.
- Extra Details:
- Interleukin-18 (IL-18) is a member of the IL-1 cytokine family and was initially identified as an Interferon-g (IFN-g) inducing factor (IGIF). The IL-18 gene was originally cloned from liver cells and has since been shown to be produced by activated monocytes/macrophages, Kupffer cells, keratinocytes, glucocorticoid-secreting adrenal cortex cells, osteoblasts and dendritic cells. IL-18 is a 24kD, non-glycosylated polypeptide that lacks a classical signal sequence and possesses a structure recognizably similar to IL-1. IL-18 is synthesized as a bio-inactive propeptide that undergoes proteolytic cleavage by either ICE (interleukin-1b converting enzyme) or another caspase to generate a mature, bioactive, 18kD molecule. In both the mature and propeptide forms, IL-18 shows 64% aa sequence identity from mouse to human. IL-18 does not appear to show any primary sequence similarity to any other known cytokines. Rat IL-18 has also been isolated, and found to be 194aa in length with a 91%aa sequence identity to mouse IL-18. Human IL-18 has been found to induce the production of IFN-g and GM-CSF while inhibiting the production of IL-10 by PBMC. With respect to human T cells, IL-18 enhances Th1 cytokine production and stimulates cell proliferation via an IL-2-dependent pathway. Human IL-18 can also inhibit the synthesis of IgE by B cells. Thus, IL-18 plays an important role in immunological and inflammatory reactions. Currently, the bioactivity of human IL-18 is often determined by its capacity to augment the levels of IFN-g produced by T cells as measured in tissue culture supernatants. Applications: Suitable for use in ELISA and Western Blot. Other applications not tested. Recommended Dilution: ELISA: 1:1000-1:5000 Western Blot: 1:500-1:2000 Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
- Shipping Conditions:
- Blue Ice