Human IL-21 R PharmaGenie ELISA Kit (SBRS0757)

Quantify human Interleukin-21 Receptor (IL-21R) in experimental samples with this ELISA kit from Assay Genie. IL-21R is the type I transmembrane receptor for interleukin-21, a gamma-chain family cytokine that shapes B-cell differentiation, sustains T-follicular helper cell populations, and modulates natural killer cell activity. Researchers studying autoimmune models, transplant tolerance, lymphoma biology, and downstream JAK-STAT cytokine signaling use IL-21R measurements to track receptor surface expression and proteolytic shedding events.

Validated for cell culture supernatant, serum, and plasma samples, the 96-assay kit accommodates both in vitro cell-based workflows and analysis of clinical specimens. Lyophilized standards, biotinylated capture and detection antibodies, streptavidin conjugate, wash buffer, and substrate solution are supplied in individual vials, supporting a complete microplate run. The absorbance-based readout is compatible with standard ELISA plate readers, and the included protocol outlines sample preparation, recommended dilution ranges, and step-by-step assay procedure to deliver reliable quantification of this key immune regulatory receptor across human research applications.