FRAP Has Revealed That Some Proteins Move in Cell Membranes

question 34

Multiple Choice

FRAP has revealed that some proteins move in cell membranes much slower than they move in reconstituted liposomes.Which of the following could account for limited mobility of proteins in cell plasma membranes?

• A)association with other proteins in a large complex.
• B)association with lipid rafts.
• C)anchorage to the extracellular matrix.
• D)anchorage to the cell cytoskeleton.
• E)All could limit protein mobility.

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