Orthology established by Hammond et al., 2009 (10 genes)

Orthology for en1a ( Chr: 9 )
Orthology for en1b ( Chr: 1 )
Orthology for en2a ( Chr: 7 )
Orthology for en2b ( Chr: 2 )
Orthology for fsta ( Chr: 5 )
Orthology for fstb ( Chr: 10 )
Orthology for prdm1a ( Chr: 16 )
Orthology for prdm1b ( Chr: 19 )
Orthology for ptch1 ( Chr: 8 )
Orthology for ptch2 ( Chr: 2 )