this paper reviews briefly some of the radioenzymatic techniques presently available for assaying norepinephrine ( ne ) , epinephrine ( e ) , dopamine ( da ) , serotonin , and the trace amines octopamine ( oa ) , phenylethanolamine ( peoha ) , phenylethylamine ( pea ) , tyramine ( ta ) and tryptamine ( t ) .
C0028351
norepinephrine
C0014563
epinephrine