3,3'-diiodo-L-thyronine + iodide + A + H(+) <=> 3,3',5'-triiodo-L-thyronine + AH2
3,3'-diiodo-l-thyronine + iodide + a + h(+) <=> 3,3',5'-triiodo-l-thyronine + ah2
3,3'-diiodo-L-thyronine + iodide + A + H(+) <=> 3,3',5'-triiodo-L-thyronine + AH2
3,3'-diiodo-l-thyronine + iodide + a + h(+) <=> 3,3',5'-triiodo-l-thyronine + ah2