Fig. 4.

Cluster analysis of 162 differentially regulated genes from five microarray experiments showing the trend in time course. A. The average-linkage hierarchal clustering of the expression data (log₂) of all the 162 significant genes. The rows represent individual genes categorized into five hierarchical clusters according to differential expression levels. The columns represent the five microarray experiments showing the gene expression pattern for each time point according to the five clusters. B. The time course trend of expression of all of the genes represented in each cluster.