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Mild α-Thalassemia Caused by a Mosaic α-Globin Gene Mutation

Abstract We describe a new α-globin chain variant in a Chinese subject. This novel variant, with a Val→Met substitution at codon 93 of the α-globin chain, has been named Hb Qingcheng (HBA1: c.280G>A) for where the proband was born. A woman with somatic mosaicism for Hb Qingcheng presented with the phenotype of mild α-thalassemia (α-thal).