Normal Hb A2 β-thalassemia trait: frameshift mutation (HBB: c.187_251dup) in cis with the Hb A2' δ-globin gene missense mutation (HBD: c.49G>C).

Abstract excerpt

We report the case of a father and daughter who are heterozygous for a duplication of 65 bp within exon 2 of the β-globin gene, resulting in an altered and truncated β-globin chain that is predicted to be non functional. The β-globin gene mutation is in cis with the common Hb A2 ' missense mutation of the δ-globin gene (HBD: c.49G>C), resulting in β-thalassemia (β-thal) trait with normal levels of Hb A2. This is...

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