BIOL 112 Lecture 5: BIOL 112 Dent, Schoeck Spring 2015 Lecture Note
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BIOL 112 Full Course Notes
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Phospholipids and glycolipids are asymmetrically distributed ! Some proteins bind to speci c cytosolic phospholipids ! Proteins can be amphipathic (have a hydrophobic and and a hydrophilic end) ! Amphipathic proteins can integrate into lipid bilayers ! Proteins move laterally in the membrane (in the same. Cannot move vertically due to hydrophilic amino acids ! way as lipids do) ! !- fatty acid tails of phospholipid give rise to hydrophobic. !- integral (transmembrane) proteins ! interior ! water and for the hydrophilic exterior of the membrane ! Polar phosphorus heads of the phospholipid associates with. Transmembrane proteins have hydrophobic regions (r groups that are hydrophobic) that permit their integration into the hydrophobic core of the bilayer ! Peripheral membrane proteins that do not contain transmembrane domains can be covalently attached to lipids or bound non-covalently to other transmembrane proteins ! Absence of hydrophobic region prevents them from integrating into hydrophobic core !