3d image of dipalmitoylphosphatidylcholine skeletal formula

dipalmitoylphosphatidylcholine dppc lecithin palmitic acid phosphatidylcholine pulmonary surfactants breathing alveolar collapse liposomes lung surfactant ls surface-active surface tension lungs gas exchange monolayer biosynthesis pneumocyte amphipathic hydrophilic polar hydrophobic pc sphingomyelin phosphatidylethanolamine phospholipid membrane choline cell arachidonic acid lipid phosphocholine cholesterol fatty lysophosphatidylcholine bilayer glycerophospholipid phosphatidylserine lipophilic molecule molecular formula skeletal structural structure 3d