1. Dockray, G.B. (1979). Comparative biochemistry and physiology of gut hormones. Annu. Rev. Physiol. 41, 83–95
2. Erspamer, V., Melchiorri, P., Broccardo, M., Erspamer, G.F., Falaschi, P., Improta, G., Negri, L., and Renda, T. (1981). The braingut-skin triangle: New peptides. Peptides 2 (Suppl. 2) 7–16
3. Suchanek, G., and Kreil, G. 1977 Translation of melittin mes- senger RNA in vitro yields a product terminating with glutaminylglycine rather than with glutaaninamide. Proc. Natl. Acad. Sci. U.S.A. 74, 975–978
4. Solcia, E., Capella, C. Buffa, R., Usellini, L., Fiacca, R., and Sessa, F. (1981) Endocrine cells of the digestive system. In: Johnson, L.R. (ed.). Physiology of the Gastrointestinal Tract vol. 1 pp. 39–58. New York: Raven Press )
5. Jessen, K.R. Polak, J.M., Van Noortden, Blown, S.R., and Burnstock, G. (1980). Peptide-containing neurones connect the two ganglionated plexuses of the enteric nervous system. Nature (Lord.). 283: 391–393