dha binding was rapid , saturable , of high affinity ( dissociation constant = 2 nm ) , and of low capacity ( 246 to 576 fmoles/mg of protein ) , and a adrenergic competitors demonstrated both stereoselectivity ( [ - ] isomer much greater than [ + ] isomer ) and a rank order of potency ( isoproterenol much greater than norepinephrine greater than epinephrine ) characteristic of the beta-adrenergic receptor . beta-adrenergic receptors in the lung tissue of both mature and immature female new zealand white rabbits were investigated under various sex steroid situations .
C0028351
norepinephrine
C0014563
epinephrine