Fig. 4.

Muscle protein FSR during basal, postabsorptive conditions assessed by collecting muscle biopsies 1) immediately before and 210 min after the start of a primed constant or [5,5,5-²H₃]leucine infusion or 2) at 60 min and 240 min after the start of the tracer infusion, 3) omitting the first biopsy and assuming zero background labeling, and 4) omitting the first biopsy and using a population average background enrichment. Values are means ± SEM. *Value significantly different (P < 0.05) from values obtained by measuring the labeling of muscle protein in two sequential biopsies.