Skip to Main Content
Table 5.

Changes in the 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 ofH. signifer after progressive increase in salinity from 0.7‰ to 10‰ or 20‰

Enzyme activity (μmol min−1 g−1 wet mass)
EnzymeSubstrate and effector0.7‰ (control)10‰20‰
GS 4.97±1.32 7.30±1.30 14.7±1.31*, 
OTC 22.8±5.73 35.1±7.72 48.8±2.80* 
ASS+L 0.19±0.07 0.44±0.12 0.18±0.04 
Arginase 29.6±10.2 68.6±12.0 114±9*, 
CPS Glutamine 0.04±0.01 0.13±0.05 0.10±0.02 
 Glutamine + AGA 0.15±0.04 0.24±0.03 0.35±0.05* 
 Glutamine + AGA + UTP 0.13±0.04 0.21±0.03 0.31±0.04* 
Enzyme activity (μmol min−1 g−1 wet mass)
EnzymeSubstrate and effector0.7‰ (control)10‰20‰
GS 4.97±1.32 7.30±1.30 14.7±1.31*, 
OTC 22.8±5.73 35.1±7.72 48.8±2.80* 
ASS+L 0.19±0.07 0.44±0.12 0.18±0.04 
Arginase 29.6±10.2 68.6±12.0 114±9*, 
CPS Glutamine 0.04±0.01 0.13±0.05 0.10±0.02 
 Glutamine + AGA 0.15±0.04 0.24±0.03 0.35±0.05* 
 Glutamine + AGA + UTP 0.13±0.04 0.21±0.03 0.31±0.04* 

AGA, N-acetyl-l-glutamate; UTP, uridine triphosphate.

Results represent means ± s.e.m. (N=4).

*

Significantly different from 0.7‰ control condition at P<0.05.

Significantly different from 10‰ at P<0.05.

Close Modal

or Create an Account

Close Modal
Close Modal