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| Description: (a) Spontaneous movements in the bilayer. Lipids can rotate (i.e., move 360 degrees) and move laterally (left to right) in their leaflet. (b) Flip-flop (moving between leaflets) does not happen spontaneously because the polar head group would have to pass through the hydrophobic region of the bilayer. Instead, the enzyme flippase must use the energy stored in ATP to flip phospholipids from one leaflet to the other.
Picture Stats: Views: 3579 Filesize: 51.87kB Height: 303 Width: 850 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=297 Keywords: Semifluidity of the lipid bilayer. |