Orthology established by Renn et al., 2006 (10 genes)

Orthology for sparc ( Chr: 14 )
Orthology for sparcl1 ( Chr: 1 )
Orthology for spock1 ( Chr: 14 )
Orthology for spock2 ( Chr: 13 )
Orthology for spock3 ( Chr: 1 )