Cytochrome P-450 3A enzymes are responsible for biotransformation of FK506 and rapamycin in man and rat.
Sattler M, Guengerich FP, Yun CH, Christians U, Sewing KF. Cytochrome P-450 3A enzymes are responsible for biotransformation of FK506 and rapamycin in man and rat. Drug Metab Dispos. 1992 Sep-Oct; 20(5):753-61.