Our projects are mainly focused on biological networks, at different scales, from molecular scales (molecular structures and their interactions) to “systemic” scales (protein interaction networks, gene regulatory networks, metabolic networks). The study of these biological networks, including the study of their dynamics and their evolution, is the general problem we address. We work on two different but related kinds of problems : dynamics and evolution of biological networks (metabolism, molecular interactions, regulation) on one hand and prediction and evolution of molecular structures and their interactions on the other hand.