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Groups of amino acids studied. AA: amino acids; BCAA: branched-chain AAs; MSG: monosodium glutamate.
| Essential AAs | BCAAs | MSG-Like AAs | Bitter Taste AAs | Sweet Taste AAs |
|---|---|---|---|---|
| Valine | Valine | Aspartic acid | Valine | Threonine |
| Leucine | Leucine | Glutamic acid | Methionine | Serine |
| Isoleucine | Isoleucine | Leucine | Glycine | |
| Threonine | Isoleucine | Alanine | ||
| Methionine | Phenylalanine | Proline | ||
| Phenylalanine | Histidine | |||
| Lysine | Tryptophan | |||
| Histidine | ||||
| Tryptophan |
