Fig 3 from Baelde et al, AJKD, © National Kidney Foundation. A dendrogram of unsupervised hierarchical clustering on the basis of similarity in gene expression patterns of the 6 different arrays show the degree of relationships of samples. Different colors show the normalized z score for each gene. The normalized z score for gene a is calculated as: (a) = (a − mean value of all samples for gene A)/STD (A), where (a) is the normalized value and a is the value of sample a for gene A. Green indicates upregulated genes, and red indicates downregulated genes. Abbreviations: C1a, control 1; C1b, duplicate of control 1; C2, control 2; D1a, diabetes 1; D1b, duplicate of diabetes 1; D2, diabetes 2.