A mechanism is suggested by which the membranes of lamellar bodies are converted to tubular myelin (TM) in the lung. It is argued that a simple corrugation of the membranous sheets can produce the TM formation. Such corrugation would occur in response to simple stresses acting on the lamellar body membranes. The intersections of the tubular figures are formed by fusion of adjacent corners in the corrugations. This results in a more stable hydrophobic bonding of phospholipid molecules. Strong supportive evidence for the mechanism is given by electron micrographs of TM formations.
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