| Answer | Crossword Clue |
|---|---|
| phenylalanine | An amino acid widely distributed in plant proteins. It is an essential nutrient in the diet of vertebrates |
| tryptophan | An amino acid that is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates |
| threonine | A hydrophilic amino acid that is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates |
| isoleucine | A hydrophobic amino acid that is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates |
| methionine | A sulfur-containing amino acid that is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates |
