a protein that binds catecholamines with a specificity parallel to that of their in vivo effects on cardiac contractility ( isoproterenol > epinephrine or norepinephrine > dopamine > dihydroxyphenylalanine ) was solubilized from a microsomal fraction of canine ventricular myocardium .
C0007412
catecholamines
C0028351
norepinephrine