摘要
本文从小肽与游离氨基酸（ＦＡＡ）的吸收机制及其各自转运系统氨基酸吸收的特点，以及不同蛋白质在动物胃肠道消化过程中肽的释放数量和肽链长度及其与蛋白质某些氨基酸含量的关系，探讨了两种吸收机制在氨基酸吸收中的作用。小肽吸收机制不易饱和，转运速度快，肽载体的吸收能力可能大于各种ＦＡＡ载体吸收能力的总和，在氨基酸吸收过程中，肽的比例越高，肽链长度越短，吸收越迅速。蛋白质中有效赖氨酸、苯丙氨酸和脯氨酸的含量以及加工、贮存的因素可能影响蛋白质消化过程中肽的释放数量和肽链长度。
The role of small peptides(Sp,di,tri-peptides) in the amino acids absorption and the relationship between the amino acids contents of protein and the amount and chain length of peptides released in protein degistion are reviewed. There are two different mechanisms to transport SP and FAA in small intestinal brush border membrane. The SP transport system is a proton motive force-dependent carrier and FAA transport systems are sodium dependent carriers.It was suggested that SP trasporter system has higher activty than the FAA trasport systems. The higher the proportion of pepides, the shorter clain length of peptides there are in the intestine,the faster amino acids can be absorbed. SP absorption may constitute the primary source of absorbed AA. In digestion, there are an relationship between of protein quality and the amount of and the chain length of peptides released from proteins. The contents of some EAA, such as lysine, especiel available lysine and NEAA, such as proline, in protein affect on the amount and the chain length of peptides released from protein hydrolysis. Consequently, it the appropriate proper ratio of some amino acides in protein fed to simple stomach animal Should be taren into consideration to ensure the fast absorption and utilization of amino acids in peptides.
出处
《四川农业大学学报》
CSCD
1996年第S1期19-26,共8页
Journal of Sichuan Agricultural University
基金
国家自然科学基金
