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体内氨基酸代谢的重要意义在于:(1)合成蛋白质;(2)通过分解释放能量;(3)合成其他生理活性物质。氨基酸的来源不仅来自消化道的吸收,也来自体内蛋白质的更新,人体内每天约更新300g以上的蛋白质。由于体内蛋白质分解产生的氨基酸大部分可以重复用于蛋白质再合成,故可维持氨基酸代谢的平衡。氨基酸在血浆内主要是以游离氨基酸形式在各组织间转运。血浆中氨基酸总浓度为2mM/l,其浓度虽不高更新却非常迅速,
The significance of amino acid metabolism in the body lies in: (1) the synthesis of proteins; (2) the release of energy by decomposition; (3) the synthesis of other physiologically active substances. The source of amino acids not only from the absorption of the digestive tract, but also from the body’s protein update, the body every day to update more than 300g of protein. Since most of the amino acids produced by protein breakdown in vivo can be reused for protein re-synthesis, the balance of amino acid metabolism can be maintained. Amino acids in plasma mainly in the form of free amino acids in various tissues transport. The total concentration of amino acids in plasma 2mM / l, although its concentration is not high but very fast update,