For example, saturated phospholipids with long acyl chains such as dipalmitoylphosphatidylcholine form a rigid, rather impermeable bilayer structure, while the unsaturated phosphatidylcholine species from natural sources such as egg or soy bean phosphatidylcholine provide more permeable and less stable bilayers. ... The liposome structure that is obtained is built of a number of components with their specific functions: the liposome as carrier, the antibody as homing device, PEG as stealth-coat, where stealth means coating liposomes with PEG to decrease the rate of uptake by macrophages and le...

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