REAGENT, ALINITY I T-UPTAKE (200TESTS/EA) The Alinity i T-Uptake assay is a chemiluminescent microparticle immunoassay (CMIA) used for the quantitative determination of the total binding capacity of human serum or plasma for the thyroid hormone, Thyroxine (T4), on the Alinity i analyzer The Alinity i T-Uptake assay is to be used in conjunction with Total T4 to yield a calculated Free Thyroxine Index (FTI), as an aid in the assessment of thyroid function status WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.