Altered gene expression between Hdh -HET and Hdh -KO groups. Cluster analysis of the 821 differentially expressed genes between Hdh-HET and Hdh-KO (p < 0.05). The genes were selected by comparing 6 HET samples with 6 KO samples using t-test with computing false discovery rate. The genes with p value <0.05 were selected and Hierarchical cluster analysis were performed using Cluster and TreeView http://rana.lbl.gov/EisenSoftware.htm. Each column represents a sample and each row represents a gene. The colorgram depicts high (red) and low (green) relative levels of gene expression in each sample.