The in vivo conversion of thyroxine to 3:5:3'triiodothyronine.
D013974:Thyroxine / Q000378:metabolism*; D014284:Triiodothyronine / Q000378:metabolism*
D014284:Triiodothyronine; D013974:Thyroxine
THYROXIN/metabolism; TRIIODOTHYRONINE/metabolism