Orthology established by Zhou et al., 2015 (10 genes)

Orthology for ctsh ( Chr: 18 )
Orthology for ctsk ( Chr: 16 )
Orthology for ctss1 ( Chr: 19 )
Orthology for ctss2.1 ( Chr: 16 )
Note
This gene and ctssb.2 (ZDB-GENE-050626-55) are located next to each other in the genome and appear to be the result of a tandem duplication. The tandem duplicates appear to be the orthologs of human CTSS and mouse Ctss based on amino acid identity and conserved location.
Orthology for ctss2.2 ( Chr: 16 )
Note
This gene and ctssb.1 (ZDB-GENE-050522-559) are located next to each other in the genome and appear to be the result of a tandem duplication. The tandem duplicates appear to be the orthologs of human CTSS and mouse Ctss based on amino acid identity and conserved location.