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alpha-adrenergic receptor activity (GO:0004936)
Combining with epinephrine or norepinephrine to initiate a change in cell activity via activation of a G protein, with pharmacological characteristics of alpha-adrenergic receptors.
Specific
alpha1-adrenergic receptor activity (GO:0004937)
alpha2-adrenergic receptor activity (GO:0004938)
General
adrenergic receptor activity (GO:0004935)
References
gene ontology: GO:0004936