Which protein provides the tyrosine residues necessary for the synthesis of T3 and T4 within the thyroid follicle?
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Correct answer: Thyroglobulin
Thyroglobulin is a large glycoprotein synthesized by follicular cells and secreted into the colloid. Iodine is attached to the tyrosine residues within the thyroglobulin molecule to form thyroid hormones.
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