Localization and Properties of Cholinephosphate Cytidylyltransferase Activity in Castor Bean Endosperm
The reaction catalyzed by CTP: cholinephosphate cytidylyltransferase (E.C. 22.214.171.124) has been postulated to be a control reaction in the synthesis of phosphatidylcholine (PtdCho) in animals and some plant tissues (1, 2). A number of studies utilizing animal tissues have indicated that the enzyme is regulated by translocation of a soluble enzyme to the cytosol, where it becomes activated (2). We report here a study of this enzyme in postgermination castor bean endosperm.
KeywordsSoluble Enzyme Sucrose Density Gradient Centrifugation Phosphatidylcholine Biosynthesis Cytidine Diphosphate Phosphocholine Cytidylyltransferase
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