Fluxes of citrulline (A), arginine (B), and ornithine (C) in mice infused intragastrically with a dextrose/amino acid mixture containing different amounts of CIT and ARG. Values are means ± SEMs, n = 6–9. ARG, supplemental arginine; ArgFlux, flux of arginine; CIT, supplemental citrulline; CitFlux, flux of citrulline; OrnFlux, flux of ornithine.