Gene expression profiles of the identified Th17 differentiation–associated genes. The differentially regulated genes between Th17 polarized and Th0 control cord blood CD4⁺ cells were clustered based on their expression profile during Th17 polarization over the analyzed timeframe. For each gene, the probe found to be differentially expressed for the first time was used in the analysis. The number of genes belonging to each cluster is marked to the figure. Clustering was done with the k-means method. Gene expression patterns were drawn by using cluster center values.