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Baseline and 3-month infusion protocol. Arterial and venous (AV) blood samples were obtained at 15-min intervals during an infusion of l-[ring 2H5]phenylalanine. Basal muscle biopsies from the vastus lateralis were obtained at 60 and 180 min. Post-EAA muscle biopsies were obtained at 60 and 240 min after a drink containing 7.5 g EAA.
