it is concluded that the extraneuronal o-methylating system of the rat heart handles the five catecholamines in a similar manner , although the km for uptake2 had been found to increase substantially in the order : dobutamine less than isoprenaline less than adrenaline less than noradrenaline less than dopamine ( grohmann and trendelenburg 1984b ) .
C0007412
catecholamines
C0013030
dopamine