Design of the entero-insular axis, W. Creutzfeldt; proglucagon gene structure and regulation of expression, J.F. Habener; posttranslational processing of proglucagon and postsecretory fate of proglucagon products, J.J. Holst et al; morphological aspects of GLP-1 expression in the intestine, R. Eissele; release of GLP-1 into the circulation, P.L. Brubaker; GLP-1 receptor in relation to its ligand, R. Goke et al; effects of GLP-1 on islet hormone secretion - experimental studies, H.-C. Fehmann; in vivo regulation of human islet hormone secretion by GLP-1, D.A. D'Alessio and J.W. Ensinck; signal transduction of GLP-1, H.-P. Bode and B. Goke; islet genes regulated by GLP-1, H.-C. Fehmann; GLP-1 and the glucose competence concept of pancreatic beta-cell function, G.G. Holtz and C.A. Leech; effects of GLP-1 on gastric acid and pancreatic exocrine secretion and on gastrointestinal motility, M.A. Nauck et al; GLP-1 in the central nervous system, R. Goke and B. Goke; extrapancreatic action of GLP-1, B. Goke; lessons from human studies with GLP-1 - potential of the gut hormone for clinical use, M.M. Byrne and B. Goke.