[A novel mutation in β-globin gene of a patient with β-thalassemia].

: This study was aimed to analyze the β-globin gene mutations in a patient with β-thalassemia minor. Genomic DNA was extracted from peripheral blood cells of the patient. The full-length DNA sequence coding for β-globin was amplified by polymerase chain reaction, and the gene mutation was determined by DNA sequencing. The results indicated that a heterogeneous A→G mutation was found at position 129 in intron 1 of the β-thalassemia minor patient. It is concluded that the IVS-I-129(A→G) mutation is a splicing site mutation leading to a splicing error in immature messenger RNA and a protein translation error for the β-globin gene. Thus, the IVS-I-129(A→G) is a novel mutation.