Deiodinases: Understanding Local Control of Thyroid Hormones To accurately assess thyroid function, it must be understood that deiodinase enzymes are essential control points of cellular thyroid activity that determine intracellular activation and deactivation of thyroid hormones. This local control of cellular thyroid levels is mediated through three different deiodinase enzymes present in different tissues in … Continue reading Deiodinases: Understanding Local Control of Thyroid Hormones