Anti-IL-21 Antibody

Raised in rabbit and purified by affinity-chromatography against an epitope-specific immunogen, this polyclonal reagent from Antibodies.com is designed to detect endogenous levels of IL-21 protein. The immunogen is a synthesized peptide derived from the internal region of human IL-21, giving the antibody selectivity for its native target. Supplied as a 50 µl liquid formulation in PBS containing 50% glycerol, 0.5% BSA and 0.02% sodium azide, the product is provided at a concentration of 1 mg/mL and is unconjugated, making it suitable for users who prefer to apply their own detection labels. The host species is rabbit, the clonality is polyclonal, and the conjugate state is unconjugated. Validated applications include ELISA and Western blot (WB), and the antibody has been confirmed to react with both human and mouse samples. For handling and stability, the vial is shipped at 4 °C; upon receipt it should be aliquoted and stored at –20 °C, with repeated freeze/thaw cycles avoided to preserve activity. Intended strictly for research use, this affinity-purified IL-21 reagent offers a reliable option for laboratories studying cytokine signaling, T-cell biology, or immune regulation across human and murine model systems.