Laf. Ferreira et al., STRUCTURE AND EFFECTS OF A KININ POTENTIATING FRACTION-F (APPF) ISOLATED FROM AGKISTRODON-PISCIVORUS-PISCIVORUS VENOM, Toxicon, 33(10), 1995, pp. 1313-1319
The contractile action of bradykinin on isolated smooth muscles is kno
wn to be potentiated by special peptides isolated from snake venoms an
d other animal sources. A fraction F (AppF) has been derived from Agki
strodon piscivorus piscivorus venom. This fraction does not increase t
he depressor effect of bradykinin on blood pressure, potentiates the a
ction of bradykinin on isolated guinea-pig ileum and prolongs the dura
tion of relaxation in isolated rat duodenum. This fraction was able to
inhibit the conversion of angiotensin I to angiotensin II in vitro. T
he primary structure of this decapeptide is given.