_:b663275706 . _:b663275706 . _:b663275706 . _:b663275706 "Orthology that involves two genes when duplications more recent than the species split have occurred in one species but not the other." . _:b663275706 . _:b663275706 . _:b663275706 . _:b663275706 . _:b663275706 .