| 单词 | Limiting amino acid | |
| 释义 |
Limiting amino acid
中文百科
必需氨基酸 Essential amino acid（重定向自Limiting amino acid）
必需氨基酸，指只存在食物中，动物无法合成，只能由食物中摄取，则这些氨基酸被称为必需氨基酸。动物需摄取必需氨基酸以制造蛋白质。由于不同物种的化合能力不同，对于某一物种是必需氨基酸的，对另一物种则不一定是必需氨基酸。
英语百科
Essential amino acid 必需氨基酸（重定向自Limiting amino acid）
 |
Alanine |
| Isoleucine | Arginine* | |
| Leucine | Aspartic acid | |
| Lysine | Cysteine* | |
| Methionine | Glutamic acid | |
| Phenylalanine | Glutamine* | |
| Threonine | Glycine* | |
| Tryptophan | Proline* | |
| Valine | Serine* | |
| Tyrosine* | ||
| Asparagine* | ||
| Selenocysteine | ||
(*) Essential only in certain cases.
(**) Pyrrolysine, sometimes considered "the 22nd amino acid", is not listed here as it is not used by humans.
Eukaryotes can synthesize some of the amino acids from other substrates. Consequently, only a subset of the amino acids used in protein synthesis are essential nutrients.
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