Orthology established by Hale et al., 2006 (11 genes)

Orthology for raraa ( Chr: 12 )
Orthology for rarab ( Chr: 3 )
Orthology for rarga ( Chr: 23 )
Orthology for rxrga ( Chr: 2 )
Orthology for thraa ( Chr: 3 )
Orthology for top2a ( Chr: 12 )