
Fig. 1. PACAP and VIP immunoreactivities in the gastrointestinal tract of
Xenopus laevis. (A,B) Extensive networks of PACAP-immunoreactive
nerve fibres in the myenteric plexus of the distal intestine (A) and rectum
(B). (C) PACAP-immunoreactive nerve cell body in the myenteric plexus of the
pyloric stomach. (D) PACAP-immunoreactive endocrine cells (arrows) and nerve
fibres (arrowhead) in the mucosa of the proximal intestine. (E)
VIP-immunoreactive myenteric nerve cell in the distal intestine. Bars: 25
µm (C,E), 50 µm (A,D), 100 µm (B).