Figure 4From: Validation of a single biopsy approach and bolus protein feeding to determine myofibrillar protein synthesis in stable isotope tracer studies in humansPlasma (A) and muscle intracellular free (B) phenylalanine enrichments (tracer·Tracee-1) after resistance exercise and protein ingestion (EX-FED) or protein ingestion a lone (FED) in study 2. *Significantly different from pre value, P < 0.001. All values are means ± SD; n = 8.Back to article page