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A new model system for studying the phosphatidylinositol cycle
Authors:Marie E Monaco  Marc E Lippman
Abstract:An early manifestation of the response of WRK-1 rat mammary tumor cells to vasopressin is an increase in incorporation of (32P)Pi into phospholipids. Incorporation into all classes of phospholipids is stimulated; however, incorporation into phosphatidylinositol (PI) is increased to the greatest degree (3- to 10-fold as compared with 1.3- to 2-fold for the other phosholipids). Furthermore, increased incorporation into PI is accompanied by an increased rate of PI turnover; turnover rates of the other phospholipids are unaffected by vasopressin.
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