Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCodon-substitution models to detect adaptive evolution that account for heterogeneous selective pressures among site classes.AuthorsYang Z; Swanson WJPublicationMolecular biology and evolution, 2002, Vol 19, Issue 1, p49ISSN0737-4038Publication typearticleDOI10.1093/oxfordjournals.molbev.a003981