Type 3 Deiodinase Enzyme Keeps Thyroid Hormones In Check

... Thyroid hormones (THs) are secreted by the thyroid gland and play a critical role in growth and development, so much so that reduced or excessive levels of THs during fetal and neonatal development can cause severe abnormalities. Type 3 deiodinase (D3) is involved in the degradation of thyroid hormones T3 and T4 to biologically inactive forms and as such serves as a modulator of intracellular TH levels and action... click link for more info. ...