the addition to the bolus of l-tyrosine ( 5 mm ) , bch ( 10 mm ) or bacitracin ( 2 mm ) reduced the 3h-radioactivity uptake by the choroid plexus of both enkephalins by 20-40 % , the degree of inhibition being greater for [ 3h ] -leu-enkephalin than for its analogue .
C0014298
enkephalins
C0014294
leu-enkephalin