Sciweavers

Share
BMCBI
2006

Grouping Gene Ontology terms to improve the assessment of gene set enrichment in microarray data

10 years 1 months ago
Grouping Gene Ontology terms to improve the assessment of gene set enrichment in microarray data
Background: Gene Ontology (GO) terms are often used to assess the results of microarray experiments. The most common way to do this is to perform Fisher's exact tests to find GO terms which are over-represented amongst the genes declared to be differentially expressed in the analysis of the microarray experiment. However, due to the high degree of dependence between GO terms, statistical testing is conservative, and interpretation is difficult. Results: We propose testing groups of GO terms rather than individual terms, to increase statistical power, reduce dependence between tests and improve the interpretation of results. We use the publicly available package POSOC to group the terms. Our method finds groups of GO terms significantly over-represented amongst differentially expressed genes which are not found by Fisher's tests on individual GO terms. Conclusion: Grouping Gene Ontology terms improves the interpretation of gene set enrichment for microarray data. Background I...
Alex Lewin, Ian C. Grieve
Added 10 Dec 2010
Updated 10 Dec 2010
Type Journal
Year 2006
Where BMCBI
Authors Alex Lewin, Ian C. Grieve
Comments (0)
books