PTK is an analog of palmitic acid in which the COOH group is replaced by trifluoromethyl ketone. In P388D1 cells, PTK inhibits iPLA2 activity with an IC₅₀ value of 3.8 µM. A related compound, ATK is a less potent inhibitor of iPLA2 with an IC₅₀ value of 15 µM. PTK…