These are irritating to mucous membranes and respiratory tract. The virus replicates on intracellular lipid membranes. Concentrated solutions are destructive to mucous membranes. Ultrafiltration concentrates a protein solution using selective permeable membranes. Chronic form of dryness of the mucous membranes. Phospholipids are the main structural components of all cellular membranes. Biological cell membranes and cell walls are polyanionic surfaces. These tags are quantum dots attached to proteins that penetrate cell membranes. EBOV is thought to infect humans through contact with mucous membranes or skin breaks. It is absorbed via skin, mucous membranes, and orally. Phosphatidylcholine is a major phospholipid in eukaryotic cell membranes. C4b tends to bind to bacterial cell membranes. This allows for the interaction of proteins with cellular membranes and protein domains. Tris is used to increase permeability of cell membranes. For use topically on the skin, eye, and mucous membranes.