BIOLOGY 152 Lecture Notes - Lecture 3: Peripheral Membrane Protein, Lipid Bilayer, Phospholipid

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Cell theory: all living things are composed of one or more cells, cells are the smallest units of living organisms, new cells come only from pre-existing cells by cell division. Basic framework of the membrane is the phospholipid bilayer. Membrane is considered a mosaic of lipid, protein, and carbohydrate molecules. Membrane exhibits properties that resemble a fluid because lipids and proteins can. Fluid mosaic-model: move relative to each other within the membrane. One or more regions that are physically embedded in the hydrophobic region of the phospholipid bilayer. Covalent attachment of a lipid to an amino acid side chain within a protein. Noncovalently bound to regions of integral membrane proteins that project out from the membrane, or they are bound to the polar heated groups of phospholipids. Approximately 25% o all genes encode membrane proteins: Computer programs can be used to predict the number of membrane proteins.

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