amounts of 125i-labelled thyroxine ( t4 ) and triiodothyronine ( t3 ) , representing approximately 50 per cent of the plasma concentration , were incubated with chicken plasma or serum , the proteins were separated by polyacrylamide gel electrophoresis at ph 7.4 and the distribution of the hormones determined .
C0032105
plasma
C0229671
serum