Orthology established by Waxman et al., 2007 (18 genes)

Orthology for raraa ( Chr: 12 )
Orthology for rarab ( Chr: 3 )
Orthology for rarga ( Chr: 23 )
Orthology for rargb ( Chr: 11 )
Orthology for rxraa ( Chr: 21 )
Orthology for rxrba ( Chr: 19 )
Orthology for rxrbb ( Chr: 16 )
Orthology for rxrga ( Chr: 2 )
Orthology for rxrgb ( Chr: 20 )