General Free Thyroxine ELISA Kit

The Antibodies.com General Free Thyroxine ELISA Kit uses a competitive immunoassay format for research use only, quantifying the unbound fraction of thyroxine (fT4) in laboratory samples. Because free T4 mirrors the biologically active hormone pool rather than the protein-bound reservoir tracked by total T4 measurements, this 96T microplate assay supports studies of thyroid axis physiology, endocrine disruption research, and clinical endocrinology workflows where the unbound hormone is the primary analyte of interest.

Built around antibodies directed against thyroxine, the kit lets sample and conjugated hormone compete for binding sites in a competitive ELISA configuration. A single microplate layout processes up to 96 determinations per run, supporting cohort-scale screening with consistent calibrators on the same plate, and the assay format is suitable for laboratories comparing fT4 levels between experimental groups, disease models, or treatment cohorts in a controlled run-to-run setup.

Typical applications include thyroid function research, comparative endocrinology, and method-development projects exploring how circulating free T4 concentrations shift under different physiological or experimental conditions. As a General-reactivity platform from Antibodies.com, the assay serves laboratories evaluating thyroxine dynamics beyond species-restricted studies, with kit components sufficient to complete the full 96-test workflow in a single experimental session.