[Kinetic studies of leucine flux during non-absorptive phase of digestion in rats].
On the basis of experimental data from kinetic of specific radioactivity of L-14 C-leucine in the non-absorptive phase of digestion with the known significance of some constant the model has been created of leucine flux in the scheme of four consequent compartments: portal--liver--arterial--muscle. The unknown constant of rates was determined and was given a good agreement of empirical and theoretical curves. It was concluded that the flux of leucine may be described by "crude" system of linear differential equations. It has been shown that in non-absorptive phase the flux of leucine is displaced in the site of catabolism of liver and muscle proteins testifying to the significance of the digestion phase state in evaluating amino acid fluxes.