IL-21 (Interleukin-21) is member of the family of cytokines that utilize the common gamma chain as a receptor subunit. This subunit is also a component of the receptors for IL-2, IL-4, IL-7, IL-9, and IL-15. IL-21 is produced by activated T follicular helper cells (Tfh), Th17 cells, and NKT cells. It exerts its biological effects through a heterodimeric receptor complex of the common gamma chain and the IL-21-specific IL-21 R. IL-21 supports Tfh cell development, immunoglobulin affinity maturation, plasma cell differentiation, B cell memory responses, and the migration of dendritic cells to draining lymph nodes. It costimulates the activation, proliferation, and survival of CD8+ T cells and NKT cells and promotes Th17 cell polarization. It blocks the generation of regulatory T cells and their suppressive effects on CD4+ T cells. In addition, IL-21 suppresses cutaneous hypersensitivity reactions by limiting allergen-specific IgE production and mast cell degranulation.
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IL-21 Antibody Pair [Biotin]
Novus Biologicals | Catalog # NBP3-57723
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Key Product Details
Assay Type
Sandwich ELISA
Sample Type
Cell culture supernatants from rabbits (Oryctolagus cuniculus). Can also be used to measure IL-21 in a variety of biological sample types reported in the literature, including serum, plasma, whole blood, and tissue lysates from organs such as spleen, lymph nodes, lung, and intestine. While the kit is optimized for cell culture supernatants, minor modifications to the protocol may be required when in other sample types to ensure optimal sensitivity and accuracy, allowing researchers to adjust buffers, antibody concentrations, incubation times, temperatures, and other assay conditions as needed. (100 ul)
Reactivity
Rabbit
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Product Specifications
Description
The kit contains a capture antibody, detection antibody, and recombinant protein standard for assay development, and these antibodies have been validated to function together in an ELISA format using the provided standard. The quantities of kit components are not matched, and individual components may be purchased separately. This product is for research use only.
Sample Volume Required
100 ul
Conjugate
Biotin
Preparation and Storage
Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Storage of components varies. See protocol for specific instructions.
Background: IL-21
Long Name
Interleukin 21
Alternate Names
CVID11, IL21, Za11
Gene Symbol
IL21
Additional IL-21 Products
Product Documents for IL-21 Antibody Pair [Biotin]
Certificate of Analysis
To download a Certificate of Analysis, please enter a lot or batch number in the search box below.
Product Specific Notices for IL-21 Antibody Pair [Biotin]
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Antibody Pairs are guaranteed for 6 months from date of receipt.
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