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Hb Alessandria [β37(C3)Trp→Leu; HBB: c.113G>T]: a Novel Variant on the β-Globin Chain with Slightly Increased Affinity for Oxygen Detected by Capillary Electrophoresis

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Abstract We report a novel mutation on the β-globin gene in a 68-year-old woman of Sicilian origin living in Alessandria, Italy. This mutation produces a hemoglobin (Hb) variant of Hb… Click to show full abstract

Abstract We report a novel mutation on the β-globin gene in a 68-year-old woman of Sicilian origin living in Alessandria, Italy. This mutation produces a hemoglobin (Hb) variant of Hb A that was detected by the capillary electrophoresis (CE) method during measurement of Hb A1c. The variant Hb did not separate from Hb A using different high performance liquid chromatography (HPLC) instruments. Direct DNA sequencing revealed a G>T transversion at codon 37 and subsequent substitution of a tryptophan residue for a leucine residue. The new Hb variant was named Hb Alessandria [β37(C3)Trp→Leu; HBB: c.113G>T]. The p50 value was slightly decreased while the stability test at 37 °C in isopropyl alcohol and the main erythrocyte parameters were normal. Overall, the patient appeared clinically normal.

Keywords: leu hbb; trp leu; hbb 113g; alessandria trp; detected capillary; capillary electrophoresis

Journal Title: Hemoglobin
Year Published: 2022

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