Units of activities per g tissue of glutamine synthetase (GS),carbamoylphosphate synthetase (CPS), ornithine transcarbamoylase (OTC),arginosuccinate synthetase + lyase (ASS+L) and arginase in the liver and stomach ofT. lymma in seawater (30‰) at pH 8
| . | . | Enzyme activity (μmol min−1 g−1 wet mass) . | . | |
|---|---|---|---|---|
| Enzymes . | Substrate and effector . | Liver . | Stomach . | |
| GS | - | 15.6±1.59 | 22.44±8.09 | |
| OTC | - | 34.8±3.09 | 15.27±5.64 | |
| ASS+L | - | 0.94±0.10 | 0.30±0.12 | |
| Arginase | - | 84.8±12.4 | 32.61±12.37 | |
| CPS | Glutamine | 0.13±0.02 | 0.0011±0.0072 | |
| Glutamine + AGA | 0.54±0.06 | 0.0059±0.0026 | ||
| Glutamine + AGA + UTP | 0.48±0.05 | 0.0055±0.0025 | ||
| . | . | Enzyme activity (μmol min−1 g−1 wet mass) . | . | |
|---|---|---|---|---|
| Enzymes . | Substrate and effector . | Liver . | Stomach . | |
| GS | - | 15.6±1.59 | 22.44±8.09 | |
| OTC | - | 34.8±3.09 | 15.27±5.64 | |
| ASS+L | - | 0.94±0.10 | 0.30±0.12 | |
| Arginase | - | 84.8±12.4 | 32.61±12.37 | |
| CPS | Glutamine | 0.13±0.02 | 0.0011±0.0072 | |
| Glutamine + AGA | 0.54±0.06 | 0.0059±0.0026 | ||
| Glutamine + AGA + UTP | 0.48±0.05 | 0.0055±0.0025 | ||
AGA, N-acetyl-l-glutamate; UTP, uridine triphosphate.
Results represent means ± s.e.m. (N=4).