Thyroxine (T4) (Biotin)

Store product at 4 degree C if to be used immediately within two weeks. For long-term storage, aliquot to avoid repeated freezing and thawing and store at -20 degree C. Aliquots are stable at -20 degree C for 12 months after receipt. Dilute required amount only prior to immediate use. Further dilutions can be made in assay buffer. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

Recognizes Thyroxine (T4). Reacts with the T4-BSA conjugate and free thyroxine. Reactivity with L-Thyroxine is 100% and with D-Thyroxine is 30%. Crossreactivity with Triiodothyronine (T3) is <1%.