OLIVIER GASCUEL1 AND TANJA STADLER2 1Institut de Biologie Computationnelle (IBC), LIRMM, UMR5506, CNRS and Université de Montpellier, France and 2Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule Zürich, 4058 Basel, Switzerland Correspondence to be sent to: Institut de Biologie Computationnelle (IBC), LIRMM, UMR5506, CNRS and Université de Montpellier, CC 05...