Biology 1002B Lecture Notes - Lecture 5: Integral Membrane Protein, Membrane Fluidity, Lipid Bilayer
16 Aug 2017
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Document Summary
Fluid mosaic model of membrane structure membranes are not rigid with molecules locked into place but rather consist of proteins that move around within a mixture of lipid molecules. Fluid lipid molecules of all biological membranes exist in a bilayer less than 10 nm thick. Lipid molecules vibrate, flex back and forth, spin around their long axis, move sideways, and exchange places within the same bilayer half. Exchanging places within a layer occurs millions of times a second, making the lipid molecules in the membrane highly dynamic. Mosaic most membranes contain an assortment of types of protein. Proteins move more slowly in the fluid environment of the membrane because they are larger. Membrane asymmetry proteins and other components of one half of the lipid bilayer are different from those that make up the other half of the bilayer. Meaning of hydrophilic, hydrophobic, fatty acid, saturated, membrane fluidity, desaturase. Saturated all carbons have the maximum number of hydrogens (no double bonds)
