6.9 years ago by
OMA is another good database of orthologs and contains information about both organisms omabrowser.org). You can also calculate yourself the orthologs, for instance with the Inparanoid algorithm which is available as a standalone application (http://inparanoid.sbc.su.se/).
For more information about ortholog databases and predictions, you may have a look (or instance) at
Alexeyenko, A., Lindberg, J., Pérez-Bercoff, Å., & Sonnhammer, E. L. L. (2006). Overview and comparison of ortholog databases. Drug Discovery Today: Technologies, 3(2), 137–143. doi:10.1016/j.ddtec.2006.06.002 and Altenhoff AM, Dessimoz C (2009) Phylogenetic and Functional Assessment of Orthologs Inference Projects and Methods. PLoS Comput Biol 5(1): e1000262.