Figure 1

Differentially expressed GO terms and non-differentially expressed GO terms. A, an example of a differentially expressed GO term. Identifiers (I–VIII) on the horizontal axis show the microarray data. The vertical axis shows the expression of genes A–F in the microarray data. Genes A–F are annotated with a differentially expressed GO term and are similarly upregulated in microarray data II and VI. Thus, genes that are annotated to a differentially expressed GO term are similarly upregulated or downregulated in specific microarray data when compared with their expression levels in other microarray data. B, an example of a non-differentially expressed GO term. Identifiers (I–VIII) on the horizontal axis show the microarray data. The vertical axis shows the expression of genes G–L in the microarray data. Genes G–L are annotated with a non-differentially expressed GO term and are upregulated in mutually different microarray data (i.e., discordant upregulation). Thus, genes that are annotated with a non-differentially expressed GO term are upregulated or downregulated in mutually different microarray data.