... standardCharacter Colorless crystallineMelting point 256-257° 3,5-Diiodothyronine is a metabolite of thyroid hormones ... 3',5'-diiodothyronine ((3',5'-T2) in unextracted serum. Interference in binding of radioactive 3',5'-T2 to anti-3',5 ... rT3 cross-reacted with 3',5'-T2-binding sites on anti-3',5'-T2 antibody only to the ... patients with hepatic cirrhosis, and 14.3 +/- 5.3 ng/100 ml in 31 newborns' cord ...