1 Trypsin and Chymotrypsin Inhibitors in Insects and Gut Leeches: an update *E. Clynen 1 , L. Schoofs 1 and M. Salzet 2 1. Laboratory for Developmental Physiology, Genomics and Proteomics, K.U.Leuven, Naamsestraat 59, B-3000 Leuven, Belgium. 2. Laboratoire de Neuroimmunologie des Annélides, ESA CNRS 8017, SN3,IFR 17INSERM,Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cédex, France *Address correspondence to this author at Laboratory for Developmental Physiology, Genomics and Proteomics, K.U. Leuven, Naamsestraat 59, B-3000 Leuven, Belgium Tel 32.16.324260, Fax: 32.16.323902, e-mail: elke.clynen@bio.kuleuven.ac.be hal-00167315, version 1 - 18 Aug 2007 Author manuscript, published in "Medicinal Chemistry Reviews - Online 2, 3 (2005) 197-206"