CCR9 and mature T-cell and NK-cell non-Hodgkin lymphoma: Additionally, differential gene expression analyses revealed significantly increased expression of markers of immaturity and genes expressed during development, such as CD34 (log2 fold change = 6.53, padj = 1.63 × 10–09), KIT (log2 fold change = 3.26, padj = 0.0002), DNTT (log2 fold change = 3.85, padj = 0.03), and CCR9 (log2 fold change = 5.27, padj = 6.67 × 10–12) in canine CD4+ PTCL compared to control canine CD4+ lymphocytes (Fig. 5C).