By Morton I. Grossman
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Dodson, J. P. Glusker, and D . ). Oxford Univ. Press, London and New'York, 1981: 414-432. GEP N E U R O E N D O C R I N E EVOLUTION 41 21. , Vasoactive intestinal polypeptide (VIP) in epithelial cells of the gut mucosa of an elasmobranchian cartilaginous fish, the ray. Endocrinol. , 1980, Suppl. 1:401-405. 22. , and Voigt, G. E . , On the agranular cells in the pancreatic islet tissue of the marine teleost Cottus scorpius. Acta Pathol. Microbiol. , 1964, 60:4754. 23. , Comparative morphology of pancreatic islets in animals.
42 S T U R E FALKMER et al. 41. , Identification of four endocrine cell types in the pancreas of Cottus scorpius (Teleostei) by immunofluorescence and electron microscopy. Gen. Comp. Endocrinol, 1980, 42:171-178. 42. Steiner, D . , Synthesis and post-synthesis processing of GEP peptides. University of California Los Angeles Forum Medical Sciences. This volume. 43. , Neuronal localization of pancreat ic polypeptide (PP) and vasoactive intestinal peptide (VIP) in the earthworm (Lumbricus terrestris).
In a pilot study no VIP immunoreactive material was discovered in either of the two principal islets of Cottus scorpius (J. Fahrenkrug and S . Falkmer, unpublished). GASTRIN - C C K - C A E R U L E I N The phylogeny of the gastrin family of the G E P neurohormonal peptides is also incompletely known, and, because of the close similarities in the molecules of the various forms of gastrin, C C K , and caerulein, some controversies exist. In an earlier review (44) it was stated that it seemed as if GEP NEUROENDOCRINE EVOLUTION 31 some kind of gastrin-CCK-caerulein-like polypeptides are produced, or at least stored, not only in the GI mucosa of all vertebrates and several invertebrates but also in the CNS of some species of both groups.
Cellular Basis of Chemical Messengers in the Digestive System by Morton I. Grossman