Unusual alpha adrenergic receptor potency of methyldopa metabolites on melanocyte function.


Catecholamines possessing alpha adrenergic receptor agonist properties induce lightening or reverse melanocyte stimulating hormone darkening of frog skin in vitro. The capacity to activate this alpha receptor by the methyldopa metabolites methyldopamine and methylnorepinephrine was compared with the capacity of the naturally occurring dopa metabolites… (More)


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