catecholamines stimulated lipolysis in an affinity sequence typical of the beta 1-adrenoceptor subtype : one-half maximum velocity ( 1/2 vmax ) isoproterenol ( 35 nm ) much greater than 1/2 vmax norepinephrine ( 150 nm ) approximately 1/2 vmax epinephrine ( 200 nm ) .
C0007412
catecholamines
C0022245
isoproterenol