- Evidence for the presence of two active forms of cytosolic 3,5,3'-triiodo-L-thyronine (T3)-binding protein (CTBP) in rat kidney. Specialized functions of two CTBPs in intracellular T3 translocation. Hashizume, K., Miyamoto, T., Ichikawa, K., Yamauchi, K., Sakurai, A., Ohtsuka, H., Kobayashi, M., Nishii, Y., Yamada, T. J. Biol. Chem. (1989)