the action of somatostatin ( srif ( somatotrophin release inhibiting factor ) ) was compared with that of met-enkephalin ( tyr-gly-gly-phe-met ) in the electrically stimulated guinea pig ileum myenteric plexus longitudinal muscle and with that of an enkephalin analogue ( fk 33-824 ( tyr-d-ala-gly-mephe-met- ( o ) -ol ) ) in the rat vas deferens .
C0014295
met-enkephalin
C0014298
enkephalin