Fig. 7. Alterations in Brn3b-dependent gene expression at different stages of retina development. Each column represents one developmental stage (E14.5, E16.5 and E18.5) and each horizontal line represents one cDNA clone. Fold changes (wild type/Brn3b-null) are color-coded according to the bar at the bottom of the figure; red represents downregulation in Brn3b-null retina and green represents upregulation. The cDNA clones were clustered according to similarities their expression patterns as shown by the tree of the right side of the figure. The four major clusters, A, B, C and D, are discussed in the text.