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[Studies of the presence of enzymes in various tissues of swine. 5. Studies of the activity and properties of adenosine triphosphatases in the pancreas].
Metadata
JournalArch Exp VeterinarmedNot FoundDate
1979
Type
Journal Article
Comparative Study
Volume
1979 / 33 : 885-98
Author
Stania H , Kolb E , Schineff C
Doi
Not Found
PMIDMESH
Adenosine Triphosphatases
Aging
Animals
Bicarbonates
Calcium
Calcium-Transporting ATPases
Hydrogen-Ion Concentration
Magnesium
Ouabain
Pancreas
Potassium Cyanide
Sodium-Potassium-Exchanging ATPase
Swine
Temperature
Abstract
Studies were conducted into the activities of magnesium-ATPase, sodium-potassium-ATPase, and HCO3-ATPase in homogenates of pancreas of 19 foetuses, with body weights between 340 g and 1,642 g, two piglets, with body weights of 9 kg and 10 kg, and four adult pigs. While general enzyme activity was low during foetal development, highest activies usually were recordable from HCO3-ATPase. High activities were recorded from both the piglets and adult pigs. The highest data, again, were recordable from HCO3-ATPase which is essential to the secretion of HCO3 ions. Maximum activity of magnesium-ATPase was based on an ATP-magnesium ratio of 1:1. HCO3-ATPase was best activated by 25 mM NaHCO3 and exhibited high stability to temperature. The activities of magnesium-ATPase and of HCO3-ATPase were inhibited by 10 mM of Rhodanid. Calcium-ATPase reached its maximum activity in response to 5 mM calcium concentration.
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