Table 3.

Within subject (daily) variation in 15 amino acids -nearest neighbor ratios.

1. Glycine	1.00	1.03	1.08 *	0.99
2. Alanine	1.02	1.18 ***	1.15 ***	1.05 *
3. Serine	1.06	1.12 **	1.02	1.04
4. Proline	0.96 *	1.20 ***	0.98	1.12 *
5. Valine	1.00	1.08 *	1.00	1.01
6. Leucine/Isoleucine	1.02	1.16 ***	1.01	1.03
7. Methionine	1.01	1.13 ***	1.02	0.94
8. Histidine	0.99	1.05 *	0.98	1.01
9. Phenylalanine	1.04 *	1.12 ***	1.01	0.99
10. Tyrosine	1.04 **	1.08 ***	0.99	0.94
11. Aspartate/Asparagine	1.15 ***	1.05	1.04	1.08
12. Glutamate/Glutamine	1.09 **	0.95	1.12 ***	0.96
13. Ornithine	0.99	1.02	0.92	0.98
14. Citrulline	1.02	0.84 ***	0.92	0.94
15. Arginine	1.09 ***	1.08 *	1.11 *	1.04

For each subject, the ratio of each time point relative to its previous time point was calculated using log-transformed (ln) values. Median values of the individual ratios are presented and P values (where the null hypothesis is that the overall ratio = zero) were generated by the Signed Rank Statistic. P values:

^*p<0.05,

^**p<0.01,

^***p<0.001.