Hi Simon, I just wanted to add to Sean's suggestion that you should use the 1.9.29 devel version of biomaRt (this will be in BioC2.0). Older versions of the package only retrieve the homolog id but not the query id where you started from. So if you would query a list of ids at once you wouldn't be able to know to which of the query ids the homologs correspond to. The devel version of the package returns both the query ids and their homologs. Best, Steffen Sean Davis wrote: > On Thursday 19 April 2007 16:52, Simon Lin wrote: > >> Is there a orthologes lookup table between human, mouse, and (maybe rat)? >> Hopefully, all use Entrez Gene (LocusLink) ID? >> > > Hi, Simon. Try the getHomolog() function in the biomaRt package. > > Sean > > _______________________________________________ > Bioconductor mailing list > Bioconductor at stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor >