the activation by catecholamines conformed to the physiological beta 2 type response with isoproterenol ( 1.8 . 10 ( -8 ) m ) > epinephrine ( 1.1 . 10 ( -7 ) m ) > norinephrine ( 3.2 . 10 ( -6 ) m ) .
C0007412
catecholamines
C0022245
isoproterenol