| Clue | Source | Date |
|---|---|---|
| Essential organic compounds (5,5) | ||
| Our bodies need 20+ different kinds to function | New York Times | 21 Sep 2023 |
| Protein building blocks | LA Times Daily | 22 Sep 2015 |
| Protein building blocks | ||
| Tryptophan and kin | ||
| Protein building blocks | ||
| Arginine and tryptophan, for two | ||
| Arginine and tryptophan | ||
| Protein components | ||
| Lysine and tryptophan |