[BioC] GO over representation analysis

Heike Pospisil pospisil at zbh.uni-hamburg.de
Mon Aug 25 10:42:31 CEST 2008

Hello Bioconductors,

I am looking for a method to perfom over representation analysis (Gene 
Ontology) within R. I have data from the Maize Oligonucleotide Array (two 
channel) with the GO categories for all probes on this array. I have 
clustered the genes using Maanova and I am interested in GO over 
representation of the gene lists from these clusters.

I know the GO tools from Bioconductor (e.g. GOstats), but I do not know how to 
adapt the analysis to an 'unusual' array with no annotation data package and 
now Entrez IDs. Any hints?

Thanks in advance,
Dr. Heike Pospisil      | pospisil at zbh.uni-hamburg.de
University of Hamburg   | Center for Bioinformatics 
Bundesstrasse 43        | 20146 Hamburg, Germany 
phone:+49-40-42838-7303 | fax: +49-40-42838-7312

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