Table 2.
Absolute arterial and venous amino-acid concentrations (n = 20)
| Concentrations (µmol/L) | Radial artery | Hepatic vein | Portal vein | Superior mesenteric vein | Inferior mesenteric vein | Splenic vein | Renal vein |
|---|---|---|---|---|---|---|---|
| Glutamate | 56.4 (6.5) | 122.4 (15.8) | 54.5 (6.8) | 61.1 (10.0) | 49.1 (13.9) | 43.6 (5.6) | 61.3 (7.6) |
| Asparagine | 46.0 (3.0) | 41.6 (3.1) | 50.5 (3.8) | 50.7 (6.7) | 46.4 (6.7) | 49.3 (3.7) | 44.1 (2.1) |
| Serine | 97.2 (4.7) | 92.0 (5.3) | 98.6 (3.6) | 101.8 (6.0) | 93.4 (5.1) | 94.1 (4.6) | 130.0 (8.4) |
| Glutamine | 518.1 (20.0) | 485.0 (20.3) | 481.2 (18.7) | 393.3 (5.3) | 497.7 (4.2) | 500.0 (18.8) | 509.8 (21.3) |
| Histidine | 68.8 (2.6) | 65.0 (2.8) | 73.1 (2.7) | 72.7 (4.9) | 71.3 (5.0) | 72.3 (3.3) | 71.9 (2.7) |
| Glycine | 236.9 (20.3) | 258.0 (33.3) | 256.9 (27.9) | 291.9 (12.2) | 236.6 (12.3) | 249.5 (32.0) | 247.7 (35.2) |
| Threonine | 112.6 (6.2) | 107.2 (6.0) | 118.4 (6.5) | 114.7 (4.8) | 110.8 (6.8) | 109.0 (5.1) | 119.9 (8.2) |
| Citrulline | 28.8 (2.8) | 34.6 (3.4) | 44.2 (4.0) | 65.2 (8.9) | 30.4 (13.7) | 30.0 (2.8) | 22.3 (1.9) |
| Arginine | 65.3 (5.1) | 49.3 (5.8) | 75.5 (4.7) | 83.6 (5.9) | 68.2 (4.9) | 66.2 (4.6) | 73.9 (27.3) |
| Alanine | 254.7 (22.0) | 189.9 (18.5) | 307.1 (23.7) | 323.2 (26) | 284.0 (23.0) | 265.0 (22.0) | 294.8 (8.2) |
| Taurine | 63.4 (5.3) | 67.0 (3.8) | 70.5 (6.4) | 67.4 (6.4) | 71.1 (9.0) | 73.6 (8.0) | 61.2 (5.2) |
| aaba | 18.4 (1.1) | 18.5 (1.1) | 18.3 (1.1) | 18.8 (6.1) | 18.5 (5.8) | 18.1 (1.1) | 18.9 (1.3) |
| Tyrosine | 52.1 (3.3) | 44.4 (3.0) | 50.6 (3.1) | 54.9 (6.8) | 52.5 (6.1) | 51.7 (4.1) | 58.0 (4.0) |
| Valine | 188.8 (7.3) | 190.0 (7.5) | 194.7 (6.8) | 201.0 (4.0) | 187.4 (3.9) | 193.2 (8.3) | 185.2 (8.3) |
| Methionine | 24.2 (1.6) | 19.1 (1.6) | 25.6 (1.1) | 27.8 (8.4) | 23.6 (6.4) | 23.5 (1.5) | 22.4 (1.9) |
| Isoleucine | 63.9 (4.2) | 63.6 (4.5) | 66.7 (4.0) | 68.8 (5.4) | 65.2 (6.1) | 61.5 (4.0) | 62.3 (4.8) |
| Phenylalanine | 52.4 (2.0) | 49.7 (2.1) | 56.1 (1.7) | 56.4 (4.3) | 55.0 (4.1) | 54.9 (2.1) | 53.2 (2.2) |
| Tryptophan | 30.1 (1.8) | 28.9 (1.7) | 29.4 (1.6) | 30.5 (5.1) | 28.8 (5.5) | 27.3 (1.3) | 29.2 (1.6) |
| Leucine | 114.3 (6.0) | 115.0 (6.5) | 124.3 (5.4) | 124.4 (5.4) | 116.6 (5.5) | 122.8 (6.8) | 118.4 (6.8) |
| Ornithine | 63.1 (5.7) | 76.3 (7.4) | 61.5 (4.9) | 58.3 (8.8) | 61.4 (8.6) | 67.3 (5.9) | 73.1 (8.3) |
| Lysine | 137.9 (7.8) | 135.5 (6.4) | 159.1 (6.8) | 159.9 (4.7) | 152.0 (5.0) | 149.3 (5.5) | 154.3 (6.9) |
Results are presented as means (SEM)
aaba α-aminobutyric acid