Human Immunoglobulin E (IgE) Antigen ≥95%

Sourced from human myeloma plasma and qualified as immunogen grade, this unconjugated native antigen from Antibodies.com is supplied as a 100 µg liquid preparation of human immunoglobulin E (IgE). The reagent is reported at ≥95% purity by SDS-PAGE and is presented in a buffer of 15 mM potassium phosphate (pH 7.4) containing 150 mM NaCl and 0.05% sodium azide, intended for research use only. Each lot is documented as non-reactive for HBsAg, anti-HCV and anti-HBc and negative for anti-HIV 1 and 2 by FDA-approved tests, supporting its use as a reliable reference standard or immunogen in assays such as ELISA, immunonephelometry and immunoelectrophoresis that quantify human IgE. The target species reactivity is human, and the protein is associated with the standard immunoglobulin heavy constant epsilon / IGHE / Ig epsilon chain C region nomenclature, distinguishing it from other immunoglobulin isotypes like IgA, IgD, IgG and IgM. As a ready-to-use liquid formulation with no reconstitution step required, it is convenient for assay workflows that demand a defined human IgE antigen, including allergy research, immunoglobulin quantification, calibrator preparation, and use as a positive control in the development of anti-IgE antibodies. For handling, the vial is shipped at 4 °C; upon delivery it should be aliquoted and stored at -20 °C, with repeated freeze/thaw cycles avoided to preserve activity.