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Studies on (Na+-K+)-activated ATPase XXXIV. Phosphatidylserine not essential for (Na+-K+)-ATPase activity

Authors
Journal
Biochimica et Biophysica Acta (BBA) - Biomembranes
0005-2736
Publisher
Elsevier
Publication Date
Volume
323
Issue
3
Identifiers
DOI: 10.1016/0005-2736(73)90193-4

Abstract

Abstract An (Na +-K +)-ATPase preparation, consisting of NaI-treated microsomes from cattle brain, was incubated with a phosphatidylserine decarboxylase preparation from Escherichia coli. This led to a reduction in the phosphatidylserine content from 10.1 % to less than 0.1%, accompanied by an equimolar formation of phosphatidylethanolamine. Since the (Na +-K +)-ATPase activity was not reduced, it can be concluded that phosphatidylserine is not essential for the Na +-K +)-ATPase activity.

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