<prompt> Thyroid peroxidase is not involved inOxidizes iodide to atomic iodineFrequent epitope of autoantibodiesent epitopeSecretion of thyroglobulin into the colloidLiberates iodine for addition on to thyrosine resideues on thyroglobulin  <response>: Inorganic iodine enters the body primarily as iodide, I-. After entering the thyroid follicle or thyroid follicular cell a NaI-sympoer NIS on the basolateral side, iodide is shuttled across the apical membrane into the colloid pendrin, after which thyroid peroxidase oxidizes iodide to atomic iodine I or iodinium I.The organification of iodine, the incorporation of iodine into thyroglobulin for the production of thyroid hormone, is nonspecific; that is, there is no TPO-bound intermediate, but iodination occurs reactive iodine species released from TPO.The chemical reactions catalyzed by thyroid peroxidase occur on the outer apical membrane surface and are mediated by hydrogen peroxide.Ref: DM Vasudevan, 7th edition, page no: 673 