Keywords: PM, Plasma membrane; PL, Phospholipids; PC, Phosphatidylcholine; PS, Phosphatidylserine; PI, Phosphatidylinositol; PE, Phosphatidylethanolamine; PG, Phosphatidylglycerol; DPG, Diphosphatidylglycerol; CH, CholesterolFreezing rate; Phospholipids; Membrane;