Salinity adaptation of HCO3--dependent ATPase activity in the gills of blue crab (Callinectes sapidus).

@article{Lee1982SalinityAO,
  title={Salinity adaptation of HCO3--dependent ATPase activity in the gills of blue crab (Callinectes sapidus).},
  author={Sun Hi Lee},
  journal={Biochimica et biophysica acta},
  year={1982},
  volume={689 1},
  pages={143-54}
}
  • Sun Hi Lee
  • Published 1982 in Biochimica et biophysica acta
A bicarbonate-dependent ATPase (EC 3.6.1.3) was found in microsomal preparations from blue crab gills. When the crabs were transferred to low salinity (200 mosmolal) from seawater (1000 mosmolal), the HCO3- dependent ATPase increased in all gill pairs, reaching its new steady state in 2 weeks. The greatest increase occurred in the sixth and seventh gill pairs (approx. 2.5-fold). Maximal enzyme activity was observed at an Mg2+ concentration of 2 mM and an optimal pH of 7.8. The apparent Ka for… CONTINUE READING