- Human type 3 iodothyronine selenodeiodinase is located in the plasma membrane and undergoes rapid internalization to endosomes. Baqui, M., Botero, D., Gereben, B., Curcio, C., Harney, J.W., Salvatore, D., Sorimachi, K., Larsen, P.R., Bianco, A.C. J. Biol. Chem. (2003)