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Effects of EP4 receptor agonist stimulation on the association between GRK2 and the EP4 receptor. a Confocal imaging of GRK2 and the EP4 receptor in FLSs. b The co-localization between two proteins of the EP4 receptor and GRK2 in the FLS. c CAY10598-stimulated FLS lysates were immunoprecipitated using an anti-EP4 receptor antibody and subjected to Western blotting to visualize GRK2 to evaluate its association with the EP4 receptor
