Figure 1

Data processing for construction of the transcriptional network. Filters were applied to original probe sets on ATH1 chip to remove the genes with expression lower than the mean of 100 and with correlation to other genes lower than the threshold of 0.7. The network was then constructed and the largest connected component of this network was retained; smaller connected components as well as genes with only one neighbor in the giant connected component were filtered out. This resulting network, containing 13,456 genes, was then clustered. Enrichment of Gene Ontology terms in groups of filtered genes is indicated.