We characterized the thalassemia phenotypes of the HUDEP-2 beta-thal clones with PPEs (CD6, CD17, CD19, IVS-I-1, IVS-I-5, CD39, CD71/72, IVS-II-1, and IVS-II-745) and IPEs (-88 and CD26). This evidence concerns the gene DPP4 and thalassemia.