using either human placental microsomal 5-deiodinase as enzyme ( 5-di ) and thyroxine as substrate or rat liver ( rl ) microsomal 5'-deiodinase ( 5'di ) as enzyme and reverse [ ( 3'- or 5'- ) -125i ] triiodo-l-thyronine ( [ 125i ] rt3 ) as substrate , activation of 5'-di in the presence of nadph was observed using either human placental or rat liver cytosolic components , but there was no activation of 5-di .
C0086418
human
C3538902
di