obsolete protein-tyrosine iodotransferase activity (obsolete GO:0160320)
OBSOLETE. Catalysis of the reaction: [thyroglobulin]-L-tyrosine + iodide + H2O2 + H+ = [thyroglobulin]-3-iodo-L-tyrosine + 2 H2O and [thyroglobulin]-3-iodo-L-tyrosine + iodide + H2O2 + H+ = [thyroglobulin]-3,5-diiodo-L-tyrosine + 2 H2O.