the affinity of the catechol estrogen 20-hydroxyestrone ( 2ohe1 ) , km = 5 microm , for the enzyme was found to be at least 90-fold higher than that of the catecholamines norepinephrine , epinephrine , and dopamine ( 450 , 490 , and 850 microm , respectively ) .
C0007412
catecholamines
C0013030
dopamine