I think the OP wants to map aliases to official gene symbols rather than mapping affy probe ids to symbols. Something like this should work: > library(org.Hs.eg.db) > eg <- get("GAB", org.Hs.egALIAS2EG) > symb <- get(eg, org.Hs.egSYMBOL) > symb [1] "A1BG" You can also do these things directly using sql statements if interested, see the AnnotationDbi vignette for examples. Best, Jim Gundala Viswanath wrote: > Hi, > > >>> Is there a function available on Bioconductor to convert gene symbol >>> aliases to official gene symbols? > > > Yes. Is this you what you are looking for? > > >> source('http://bioconductor.org/biocLite.R') >> biocLite() # installs a number of pacakges >> biocLite('hgu95av2.db') # a particular chip 'annotation' file >> library(hgu95av2.db) >> hgu95av2GENENAME[["1053_at"]] > [1] "replication factor C (activator 1) 2, 40kDa" >> hgu95av2SYMBOL[["1053_at"]] > [1] "RFC2" > > Further option can be found here: >> help(package=hgu95av2.db) > > and > >> openVignette() > > > - G.V. > ____________________________________________ >>> 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 >> >> >> -- >> Kang Tu >> >> _______________________________________________ >> 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 > > _______________________________________________ > 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 -- James W. MacDonald, MS Biostatistician UMCCC cDNA and Affymetrix Core University of Michigan 1500 E Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623