| GPCR | G protein-coupled receptor |
| GRK | G protein-coupled receptor kinase |
| β-Arr | β-Arrestin |
| NO | Nitric oxide |
| eNOS | Endothelial nitric oxide synthase |
| nNOS | Neuronal nitric oxide synthase |
| β-AR | β-Adrenergic receptor |
| SNO | S-nitrosylation |
| ROS | Reactive oxygen species |
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