phospholipase a1 in fl cell cytosol showed activity only in the presence of a non-ionic detergent , triton x-100 , or certain phospholipids such as phosphatidylinositol , cardiolipin , phosphatidylserine , phosphatidic acid , phosphatidylethanolamine , and lysophosphatidylcholine , among which phosphatidylinositol was the most active stimulator of the activity .
C0007634
cell
C1383501
cytosol