Thermo Fisher Scientific IL-21 Polyclonal Antibody
IL-21 단백질을 인식하는 Rabbit Polyclonal 항체로, WB 및 IHC(P)에서 사용 가능. Human, Mouse, Rat 반응성. 항원 친화 크로마토그래피로 정제된 액상 항체로, 2–8°C 보관 권장. IL-21 관련 면역조절 연구에 적합.
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Applications and Tested Dilution
| Application | Tested Dilution |
|---|---|
| Western Blot (WB) | 0.5–2 µg/mL |
| Immunohistochemistry (Paraffin) (IHC (P)) | 0.5–2 µg/mL |
Product Specifications
| 항목 | 내용 |
|---|---|
| Species Reactivity | Human, Mouse, Rat |
| Host / Isotype | Rabbit / IgG |
| Class | Polyclonal |
| Type | Antibody |
| Immunogen | A peptide corresponding to 15 amino acids near the center of human IL-21 precursor. The immunogen is located within the last 50 amino acids of IL-21. |
| Conjugate | Unconjugated |
| Form | Liquid |
| Concentration | 1.0 mg/mL |
| Purification | Antigen affinity chromatography |
| Storage Buffer | PBS |
| Contains | 0.02% sodium azide |
| Storage Conditions | Maintain refrigerated at 2–8°C for up to 3 months. For long-term storage store at -20°C. |
| Shipping Conditions | Ambient (domestic); Wet ice (international) |
| RRID | AB_11151950 |
Product Specific Information
- Suggested positive controls: Human Tonsil, Mouse Spleen, or Rat Spleen Lysate
- PA5-19981 can be used with blocking peptide PEP-0105
- Predicted species reactivity based on immunogen sequence:
- Bovine: 100%
- Pig: 87%
- Detects both known isoforms of IL-21
- Predicted not to cross-react with other interleukin family members
Target Information
IL-21 is a 17 kDa immunomodulatory cytokine produced mainly by Natural Killer (NKT), T helper (Th) 17, and T follicular helper (TFH) cells. In TFH cells, IL-21 expression leads to autocrine signaling through IL-21R and STAT3, resulting in transcriptional activation by Bcl6.
Similar to IFN-γ for Th1 and IL-4 for Th2, IL-21 is essential for TFH cell development and effector function. It promotes T cell-dependent B cell differentiation into plasma and memory cells, stimulates IgG production, and induces apoptosis in naive B cells.
In Th17 cells, IL-21 expression with STAT3, IRF4, and RORγt upregulates IL-23R, promoting Th17 maturation and maintenance by IL-23. IL-21 also downregulates Foxp3 expression.
IL-21 deficient mice show resistance to chemically induced colitis due to impaired Th17 molecule upregulation, while elevated IL-21 levels are observed in colitis models.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
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