过去一直认为大多数动物(包括水产类)是靠肠吸收氨基酸来合成蛋白所需要的氮,而事实上,直接吸收一些短肽或较大分子的肽也是非常重要的。肠道吸收氨基酸的运输系统可能因为趋于饱和而限制吸收量,肽在肠道则有另一独立的运输系统,而且吸收速度式氨基酸更快,合成体分子蛋白的速度也明显快于氨基酸。有报道指出,日粮中添加一定量的完整肽,动物排 In the past, it has been thought that most animals, including aquatic species, rely on the amino acids that enter the gut to synthesize the nitrogen required for the protein. In fact, it is also important to directly absorb some short peptides or larger peptides. Transport systems for gut absorption of amino acids may limit their uptake as they become saturated and peptides have another independent transport system in the gut and absorb faster rates of amino acids faster than synthetic amino acids. It has been reported that the diet added a certain amount of whole peptide, animal row