title: Introduction. Membrane asymmetry and lipid transport.
mesh_terms: D000818:Animals; D001692:Biological Transport / Q000502:physiology; D002462:Cell Membrane / Q000378:metabolism*; D006801:Humans; D008563:Membrane Lipids / Q000378:metabolism*; D011506:Proteins / Q000378:metabolism*
chemical_list: D008563:Membrane Lipids; D011506:Proteins