the aim of the present study was to determine the extent to which plasma catecholamines are conjugated in different animals compared to man and how widespread is the presence of dihydroxyphenylalanine ( dopa ) and 3-methoxy-4-hydroxyphenylalanine ( 3-omd ) in plasma among the different animal species .
C0007412
catecholamines
C0013023
dihydroxyphenylalanine