Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleHow essential are nonessential genes?AuthorsFang G; Rocha E; Danchin APublicationMolecular biology and evolution, 2005, Vol 22, Issue 11, p2147ISSN0737-4038Publication typearticleDOI10.1093/molbev/msi211