Different effect of cGMP and cAMP in the intestine of European eel, Anguilla anguilla - TRISCHITTA F; DENARO M. G; FAGGIO C; MANDOLFINO M; SCHETTINO, Trifone (Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229, 1996)