Figure 1

Heat map of hierarchical clustering of 6676 genes expressed in epidermal tissues. Genes expressed with signal intensity more than 800 were included in this analysis. Clustering was done using Cluster 3 software (clustering type: hierarchical clustering, Distance metric: Pearson correlation). The colors in the map display the relative values of all tiles within the given 11 developmental stages; green indicates the lowest expression, black indicates the intermediate expression, and red indicates the highest expression. The numerical values give the actual values on a log 2 scale, which were associated with each color. The color scale bar is shown at the top right corner of the figure. A: Genes clustered by the given 11 developmental stages. B: Genes grouped into three clusters on the basis of the similarity of expression.