Cell Membrane2 - What is the name of the configuration that...

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Cell Membranes Problems Problem : Will you find the same set of membrane proteins in each cell membrane? Solution for Problem 1 >> No. Membrane proteins perform a number of functions within cells, as a result, different proteins are necessary in different regions of cells depending on the function of the cell and the interactions it may take part in. Problem : What are the names of the two main classes of membrane proteins and how could you tell one from the other? Solution for Problem 2 >> The two main classes of membrane proteins are integral versus peripheral proteins. Since peripheral proteins are easily dissociated from the lipid bilayer, one could treat a cell with a mild detergent that does not disrupt the cell membrane and then see if the specific protein remains associated with the lipid bilayer or is removed. Problem :
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Unformatted text preview: What is the name of the configuration that membrane proteins adopt in regions that span the lipid bilayer? Solution for Problem 3 >> This configuration is called an alpha-helix. It is the same structure that DNA adopts naturally. Problem : Which class of proteins, integral or peripheral, are freer to move around within the lipid bilayer? Solution for Problem 4 >> Integral proteins can be thought of as icebergs that float in a lipid bilayer sea. They are relatively mobile in the cell membrane. Problem : The cell surface is covered with an additional set of molecules. What name is given to these structures and what is their function in the cell? Solution for Problem 5 >> The cell surface is covered with a cell coat or glycocalyx which consists of carbohydrate chains. They help protect the cell from damage....
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