Hello I have a semantic question can we say that a gene family in one specie is ortolog ro the same multigenic family in an other specie Thanks Piere Pierre Pontarotti INSERM U119 27 bd Lei Roure 13009 Marseille France Tel: (33) 91 75 84 08 Fax: (33) 91 26 03 64 email: pontaro at infobiogen.fr