Cellulose acetate hemoglobin electrophoresis and HPLC analysis of cell lysates showed that mock and GFP vector-transduced β-thalassemia cells produced HbF and some HbA and HbA2 (α2δ2), which is consistent with these patients having a β+/β0 or β+/β+ thalassemia genotype.17 This evidence concerns the gene HBA2 and thalassemia.