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Coimmunoprecipitation of G proteins with membrane-bound caveolin. Proteins solubilized from plasma membranes (P) were subjected to immunoprecipitation (IP) using antibodies to the indicated proteins bound to magnetic beads. The starting material (SM) (5 μg) solubilized from P and equal volumes of the material bound to the beads (I) or unbound in the supernatant (S) were subjected to Western analysis using antibodies to the indicated proteins.
