i analyzed for free and sulfate-conjugated catecholamines and dopa ( 3,4-dihydroxyphenylalanine ) in four aliquots of a single plasma pool with use of upjohn 's `` '' cat-a-kit '' '' ( catecholamines radioenzymatic assay kit [ 3h ] .
C0013023
dihydroxyphenylalanine
C0007412
( catecholamin