Table 5.
Serum Phe and Tyr concentrations in Miniature Dachshunds, Beagles, Labrador Retrievers, and all dogs pooled fed diets fed diets containing increasing levels of Phe
| Dietary Phe, % | ||||||||
|---|---|---|---|---|---|---|---|---|
| 0.24 | 0.29 | 0.34 | 0.44 | 0.54 | 0.64 | 0.74 | SEM1 | |
| n = 4 | n = 4 | n = 4 | n = 4 | n = 4 | n = 4 | n = 4 | ||
| Miniature Dachshunds | ||||||||
| Phe, µM | 114.6 | 110.0 | 95.9 | 115.8 | 143.0 | 147.5 | 137.1 | 15.4 |
| Tyr, µM | 61.4 | 51.9 | 43.9 | 50.2 | 77.0 | 67.1 | 80.8 | 10.2 |
| Beagles | ||||||||
| Phe, µM | 96.3 | 122.5 | 118.9 | 140.7 | 140.0 | 135.3 | 168.2* | 16.1 |
| Tyr, µM | 55.4 | 79.3 | 77.2 | 72.6 | 93.2* | 106.7* | 122.5* | 10.4 |
| Labrador Retrievers | ||||||||
| Phe, µM | 101.1 | 128.4 | 115.4 | 135.1 | 144.9* | 142.3* | 156.1* | 13.1 |
| Tyr, µM | 73.6 | 65.8 | 70.8 | 85.9 | 94.9 | 92.8 | 101.2* | 9.6 |
| n = 12 | n = 12 | n = 12 | n = 12 | n = 12 | n = 12 | n = 12 | ||
| All dogs (pooled data) | ||||||||
| Phe, µM | 101.1 | 128.3 | 115.4 | 135.1 | 144.9* | 142.3* | 156.1* | 13.1 |
| Tyr, µM | 73.6 | 65.8 | 70.8 | 85.9 | 94.9 | 92.8 | 101.2* | 9.6 |
Phe = phenylalanine; Tyr = tyrosine.
1SEM, n = 4 at each level of dietary Phe for Miniature Dachshunds, Beagles, and Labrador Retrievers; n = 12 at each level of dietary Phe for pooled data.
*Significantly different (P ≤ 0.05) when compared to the lowest level of dietary Phe.