harlan teklad官网动物饲料 TD.99366氨基酸饮食 TD.90262蛋氨酸和胆碱缺乏饮食
氨基酸定义
一些氨基酸定义的公式如下所示。当一种饮食需要缺乏一种或多种氨基酸，或者需要调整特定的氨基酸水平时，就使用这种饮食。
公式实例:
有时，这种饮食被用来进一步降低某些维生素的背景水平，这些维生素存在于蛋白质来源，如酪蛋白或无维生素的酪蛋白(醇提取的)酪蛋白中。一些叶酸缺乏的饮食使用这种方法。
大多数氨基酸定义的饮食的氨基酸谱是基于哈珀和罗杰斯的工作(J.Nutr)。(1965)87：267-276)，不代表酪蛋白等完整蛋白质来源的氨基酸谱。还可以指定其他氨基酸谱。当氨基酸被去除或减少时，如果需要，可以进行等氮调节。
Amino acid defined | Envigo
A few amino acid defined formulas are shown below. This type of diet is used when a diet needs to be deficient in one or more amino acids, or adjustments need to be made to specific amino acid levels.
Formula examples:
- TD.99366 Amino acid diet
- TD.90262 Methionine and choline deficient diet
- TD.00434 Folic acid deficient diet
- TD.99386 No lysine AA diet
Sometimes this type of diet is used to further reduce the background level of certain vitamins that are found in protein sources such as casein or vitamin-free (alcohol extracted) casein. Some folic acid deficient diets utilize this approach.
The amino acid profile for most amino acid defined diets is based on work by Harper and Rogers (J. Nutr. (1965) 87:267-276) and is not representative of the amino acid profile of an intact protein source such as casein. Other amino acid profiles can be specified. When an amino acid(s) is removed or reduced, isonitrogenous adjustment can be made if required.