Orthology established by Reischauer et al., 2009 (7 genes)

Orthology for egfra ( Chr: 2 )
Orthology for egfrb ( Unmapped )
Orthology for erbb2 ( Chr: 12 )
Orthology for erbb3a ( Chr: 6 )
Orthology for erbb3b ( Chr: 23 )
Orthology for erbb4a ( Chr: 1 )
Orthology for erbb4b ( Chr: 9 )