Orthology established by Laisney et al., 2010 (8 genes)

Orthology for btc ( Chr: 21 )
Orthology for egf ( Chr: 14 )
Orthology for egfra ( Chr: 2 )
Orthology for egfrb ( Unmapped )
Orthology for epgn ( Chr: 8 )
Orthology for hbegfa ( Chr: 14 )
Orthology for hbegfb ( Chr: 21 )
Orthology for tgfa ( Chr: 6 )