Essential   1. Histidine
2. Isoleucine
3. Leucine
4. Lysine
5. Methionine
6. Phenylalanine
7. Threonine
8. Tryptophan
9. Valine   Nonessential   1. Alanine
2. Arginine*
3. Aspartic acid
4. Cysteine*
5. Cystine
6. Glutamic acid
7. Glutamine*
8. Glycine
9. Proline
10. Serine
11. Tyrosine