Table 4.
Comparison of amino acid levels among HNC tumor subsites.
| Amino acid | p value∗ |
|---|---|
| Alanine | 0.452 |
| Alpha-aminobutyric acid | 0.116 |
| Aminoadipic acid | 0.071 |
| Arginine | 0.447 |
| Asparagine | 0.699 |
| Beta-alanine | 0.663 |
| Beta-aminobutyric acid | 0.764 |
| Citrulline | 0.474 |
| Ethanolamine | 0.026 |
| Gamma-aminobutyric acid | nc |
| Glycine | 0.075 |
| Histidine | 0.505 |
| Isoleucine | 0.483 |
| 4-Hydroxyproline | 0.585 |
| Leucine | 0.346 |
| Lysine | 0.380 |
| Methionine | 0.302 |
| 1-Methylhistidine | 0.300 |
| 3-Methylhistidine | 0.953 |
| Phenylalanine | 0.003 |
| Phosphoethanolamine | nc |
| Proline | 0.698 |
| Sarcosine | 0.712 |
| Serine | 0.087 |
| Threonine | 0.306 |
| Tryptophan | 0.066 |
| Tyrosine | 0.740 |
| Valine | 0.369 |
a p value obtained from the Kruskal-Wallis test; nc: not computable.