while the three catecholamines ( cas ) dopamine ( da ) , norepinephrine ( ne ) and epinephrine ( e ) , are wide-spread in tissues of the american eel ( anguilla rostrata ) , the bulk of these cas in the systemic blood originates from chromaffin cells in the wall of the posterior cardinal veins .
C0028351
norepinephrine
C0014563
epinephrine