蛋氨酸又名甲硫氨酸,是鱼类第一限制性氨基酸。它在鱼类的生长发育中具有重要作用,除直接参与蛋白质的合成外,还可在机体中转化为半胱氨酸、活性甲基和肌酸等活性前体物质。目前研究表明,大部分鱼类蛋氨酸的需要量为饲料蛋白质总量的2%～3%。 Methionine, also known as methionine, is the first limiting amino acid in fish. It plays an important role in the growth and development of fish. In addition to being directly involved in protein synthesis, it can also be converted into active precursor substances such as cysteine, active methyl and creatine in the body. The current research shows that the requirement of most fish methionine is 2% -3% of the total amount of feed protein.