Fig. 1.

Whole body amino acid kinetics. A: Phe and Tyr kinetics did not differ between placebo (Plac) or prednisone (Pred) treatments in either basal or insulin clamp phases of the study but declined from basal during the insulin clamp. B: Leu carbon (C) flux was not altered by Pred but declined with insulin infusion. Leu nitrogen (N) flux (deamination) was not changed by Pred or insulin. KIC-to-Leu (reamination) was increased by insulin only in the Pred trial. *Insulin phase vs. basal phase, P < 0.05.