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Abstract

A Novel Deletion of ~ 2.8 Kb Removing the Entire Alpha 2-Globin Gene Observed in a Chinese Patient with Hb H by Zongping Mo, Changshun Yu, Zhaohui Hu, Wenli Feng

Most of recognized α-thalassemia mutations include deletions of one or both α-globin genes. Here we describe a newly detected α-thalassemia-2 deletion characterized by a small 2.8 kb deletion involving the α 2 globin gene. This deletion has thus far been observed in one Chinese subject with hemoglobin H disease. Its breakpoints were detected to lie between coordinates 32485 and 35381 of the α-globin gene cluster (NG_000006.1), with a total of 2,894 nucleotides deleted. It was designated as −α2.8 deletion. The proband is a compound heterozygote deletion of --SEA and -α2.8, and the patient displayed very mild hemoglobin H disease phenotype with hemoglobin 9.8 g/dL.

DOI: 10.7754/Clin.Lab.2012.110910