Identification of a 14 kDa FK-506/rapamycin binding immunophilin from calf thymus.


Specific binding proteins (immunophilins, 12-17 kDa) have been described in the cytosol for the immunosuppressant drugs cyclosporine, FK-506, and rapamycin. We describe the identification of a low abundant minor immunophilin (14 kDa) from calf thymus. Saturation experiments using dihydro[3H]-FK-506 gave a Kd of 2 nM and the Bmax of 72 nmol/mg protein. At… (More)


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