Orthology established by Ishikawa et al., 2002 (10 genes)

Orthology for bmal1a ( Chr: 25 )
Orthology for bmal1b ( Chr: 7 )
Orthology for bmal2 ( Chr: 18 )
Orthology for clocka ( Chr: 20 )
Orthology for clockb ( Chr: 1 )
Orthology for npas2 ( Chr: 5 )