1. Anu Aaspõllu, Jüri Siigur and Ene Siigur, cDNA cloning of a novel P-I lebetase isoform Le-4, Toxicon, 46(5), 591-594, 2005

2. Katrin Trummal, Külli Tõnismägi, Ene Siigur, Anu Aaspõllu, Annika Lopp, Tarvo Sillat, Riste Saat, Lagle Kasak, Indrek Tammiste, Priit Kogerman, Nisse Kalkkinen and Jüri Siigur, A novel metalloprotease from Vipera lebetina venom induces human endothelial cell apoptosis, Toxicon, 46(1), 46-61, 2005

3. Vallikivi I., Fransson L., Hult K., Järving I., Pehk T., Samel N., Tõugu V., Villo L., Parve O., The Modelling and kinetic investigation of the lipase-catalysed acetylation of stereoisomeric prostaglandins, Journal of Molecular Catalysis B: Enzymatic, 35(1-3), 62-69, 2005