Fig 4. Whole-Body Production (WBP) of argenine metabolites.

WBP of (A) L- Glutamic Acid [1,2-¹³C₂], (B) L- Ornithine [¹³C₅], (C) L- Phenylalanine [Ring-¹³C₆)], and (D) L- Glutamine [¹⁵N₂] in low- and high-active mice. WBP was calculated from data collected over a 40 min period, normalized for lean body mass (lbm), and expressed as mean (± SE). Statistics are by t-test, * indicates p≤0.05.