“The situation is further complicated since ritanserin significantly increases phosphatidylinositol (PtdIns), phosphatidylinositol 4-phosphate (PtdIns4P) and phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) labelling whereas clorgyline significantly increases PtdIns and PtdIns4P labelling.”