{"product_id":"il-21-monoclonal-antibody-ffa21-efluor-450-ebioscience","title":"IL-21 Monoclonal Antibody (FFA21), eFluor 450, eBioscience","description":"\u003cp\u003e\u003cstrong\u003ePRODUCT DETAILS\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eHost: \u003c\/b\u003e\u003cspan\u003eRat\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eIsotype: \u003c\/b\u003e\u003cspan\u003eIgG2a, kappa\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eClonality: \u003c\/b\u003e\u003cspan\u003eMonoclonal\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eClone: \u003c\/b\u003e\u003cspan\u003eFFA21\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFormat: \u003c\/b\u003e\u003cspan\u003eeFluor 450\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eReactivity: \u003c\/b\u003e\u003cspan\u003eMs\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eApplication: \u003c\/b\u003e\u003cspan\u003eFlow Cytometry\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eTested Dilution: \u003c\/b\u003e\u003cspan\u003e1.0 µg\/test\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eConcentration: \u003c\/b\u003e\u003cspan\u003e0.2 mg\/mL\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eStorage: \u003c\/b\u003e\u003cspan\u003e4°C, store in dark, DO NOT FREEZE!\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFormulation: \u003c\/b\u003e\u003cspan\u003ePBS with 0.09% sodium azide; pH 7.2\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003ePurification: \u003c\/b\u003e\u003cspan\u003eAffinity chromatography\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eData Sheet: \u003c\/b\u003e\u003ca href=\"https:\/\/www.thermofisher.com\/order\/genome-database\/dataSheetPdf?producttype=antibody\u0026amp;productsubtype=antibody_primary\u0026amp;productId=48-7211-82\" target=\"_blank\"\u003eTDS\u003c\/a\u003e\u003c\/p\u003e \u003cbr\u003e\u003cp\u003e\u003cspan\u003e\u003cb\u003eSpecific Information\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003eDescription: This FFA21 monoclonal antibody reacts with mouse interleukin-21 (IL-21). IL-21 is a 17 kDa immunomodulatory cytokine produced mainly by NKT, T helper (Th) 17 and T follicular helper (TFH) cells. In TFH cells, IL-21 expression leads to autocrine signaling through the IL-21 receptor (IL-21R) and STAT3, which leads to additional transcriptional activation by Bcl6. As with IFN gamma for Th1, IL-4 for Th2 and IL-17A for Th17, IL-21 is critical for TFH cell effector function. This cytokine plays a role in T cell-dependent B cell differentiation into plasma cells and memory cells, stimulation of IgG production and induction of apoptotic signaling in naive B cells.\u003c\/p\u003e\u003cp\u003eIn Th17 cells, IL-21 expression and autocrine feedback through STAT3, IRF4 and ROR gamma t lead to upregulation of the IL-23R, thereby preparing Th17 cells for maturation and maintenance by the inflammatory cytokine IL-23. While upregulating IRF4 and ROR gamma t, IL-21 also mediates the downregulation of Foxp3. High levels of IL-21 are present in chemically-induced colitis models. IL-21-deficient mice are protected from developing colitis upon chemical treatment by their inability to upregulate Th17-associated molecules.\u003c\/p\u003e\u003cp\u003ePreliminary data suggest that clone FFA21 recognizes a different epitope than anti-mouse IL-21 clone mhalx21 (\u003ca href=\"https:\/\/www.thermofisher.com\/antibody\/product\/IL-21-Antibody-clone-mhalx21-Monoclonal\/51-7213-82\"\u003eProduct # 51-7213-83\u003c\/a\u003e).\u003c\/p\u003e\u003cp\u003eApplications Reported: This FFA21 antibody has been reported for use in intracellular staining followed by flow cytometric analysis.\u003c\/p\u003e\u003cp\u003eApplications Tested: This FFA21 antibody has been tested by intracellular staining followed by flow cytometric analysis of Th17-polarized mouse splenocytes restimulated with PMA, ionomycin and brefeldin A for 5 hours, using the Intracellular Fixation \u0026amp; Permeabilization Buffer Set (\u003ca href=\"https:\/\/www.thermofisher.com\/order\/catalog\/product\/88-8824-00\"\u003eProduct # 88-8824-00\u003c\/a\u003e) and protocol. Please refer to \"Staining Intracellular Antigens for Flow Cytometry, Protocol A: Two step protocol for intracellular (cytoplasmic) proteins\" located at \u003ca href=\"https:\/\/www.thermofisher.com\/flowprotocols\"\u003ewww.thermofisher.com\/flowprotocols\u003c\/a\u003e . This may be used at less than or equal to 1.0 µg per test. A test is defined as the amount (µg) of antibody that will stain a cell sample in a final volume of 100 µL. Cell number should be determined empirically but can range from 10^5 to 10^8 cells\/test. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest.\u003c\/p\u003e\u003cp\u003eeFluor 450 is an alternative to Pacific Blue.  eFluor 450 emits at 446 nm and is excited with the violet laser line (405 nm). Please make sure that your instrument is capable of detecting this fluorochrome.\u003c\/p\u003e\u003cp\u003eExcitation: 405 nm; Emission: 445 nm; Laser: Violet Laser.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003eFor Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.","brand":"Cytek Biosciences","offers":[{"title":"100 µg","offer_id":43190921297956,"sku":"48-7211-82","price":462.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1654\/6801\/files\/48-7211-il-21-flow-cytometry-12apr2019attiije-ffa21-ef450-abmaint_20190522180612.jpg?v=1769042977","url":"https:\/\/cytekbio.com\/ja\/products\/il-21-monoclonal-antibody-ffa21-efluor-450-ebioscience","provider":"Cytek Biosciences","version":"1.0","type":"link"}