The influence of calcium on lens ATPase activity.
The activities of ouabain-sensitive (Na-5-) and ouabain-insensitive ATPases were determined in 3.6 mM calcium-containing and calcium-free media. Three lens tissue segments were studied: the epithelium/capsule segment, the anterior cortical segment and the posterior cortical segment. In the presence of calcium, the Na-K-ATPase activity in each segment was reduced, whereas the ouabain-insensitive ATPase activity in each segment was increased.
D000251:Adenosine Triphosphatases / Q000032:analysis*; D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D004848:Epithelium / Q000201:enzymology; D007908:Lens, Crystalline / Q000201:enzymology*; D010042:Ouabain; D011188:Potassium; D011817:Rabbits; D012964:Sodium
D010042:Ouabain; D012964:Sodium; D000251:Adenosine Triphosphatases; D011188:Potassium; D002118:Calcium