electron microscopical neurohistochemical studies of the choledocho-duodenal junction of the cat revealed acetylcholinesterase-positve nerve terminals closely abutting on ( `` '' ectopic '' '' ) , mono-amine ( s ) -containing alpha-cells ( of the islets of langerhans ) scattered in small clusters between bundles of the sphincteric smooth muscle ( of oddi ) .
C0030280
g alpha-cel
C0022131
(