we recently demonstrated that during stimulation by thyrotropin-releasing hormone of rat pituitary ( gh3 ) cells phosphatidylinositol ( ptdins ) resynthesis occurs within the plasma membrane as well as the endoplasmic reticulum ( imai , a. , and gershengorn , m. c. ( 1987 ) nature , 325 , 726-728 ) .
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cells
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endoplasmic reticulum