Dear All, Interesting paper ... We should start/try to think more how to study such particular issues (evolution of networks and gene duplication) as well ... Cheers, Yves -- Yves Van de Peer, PhD. Professor in Bioinformatics and Genome Biology Department of Plant Systems Biology Ghent University Technologiepark 927 B-9052 Ghent Belgium Phone: +32 (0)9 331 3807 Cell Phone: +32 (0)476 560 091 Fax: +32 (0)9 331 3809 email: yves.vandepeer@psb.ugent.be http://www.psb.ugent.be/bioinformatics/