Iodine + tyrosine ---thyroperoxidase (TPO)---> monoiodotyrosine (MIT)
MIT + iodine -----TPO-------> diiodotyrosine (DIT)
2 DIT ------TPO------> thyroxine (T4)
T4 + selenium ----5DEO-----> triiodothyronine (T3) + iodine
The next pages will provide further details on the T4 and T3 hormones.