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(Α) Western blotting for β2-adrenergic receptor (AR) protein expression in each group after 48 h culture of myocardial cells, compared with (Β) sham+EGFP, #P<0.05; compared with HF+EGFP, *P<0.05 (n=4). EGFP, enhanced green fluorescent protein; OD, optical density.
