General Free Thyroxine (fT4) ELISA Kit

Free thyroxine (fT4) quantification is essential for evaluating thyroid function in clinical research and laboratory diagnostics. This competitive immunoassay kit from Assay Genie provides a self-contained workflow for measuring unbound thyroxine, the biologically active hormone fraction that crosses cell membranes and binds nuclear receptors to regulate metabolism. Investigators use fT4 measurements alongside TSH and T3 values to study endocrine disorders, hormone regulation pathways, and metabolic dysfunction in research contexts.

The kit is supplied in a 96 assays format containing all reagents required for in vitro research workflows: pre-coated microtitre plate wells, calibrated reference standards, assay buffer, enzyme conjugate, wash solution, and substrate. The procedure relies on competitive binding, where sample analyte competes with a labelled conjugate for limited antibody binding sites, then absorbance is measured on a standard plate reader. Sample preparation tolerates a diverse set of specimen categories relevant to thyroid investigations.

Marketed exclusively for research use, this thyroid hormone assay supports investigations into hyperthyroidism, hypothyroidism, autoimmune thyroiditis, and broader endocrine signalling networks. The universal reactivity profile accommodates multiple experimental models used in metabolic and endocrine research programmes. Each kit box ships with a protocol insert detailing reagent volumes, incubation times, and standard curve construction for accurate quantitation.