T to C substitution at -175 or -173 of the gamma-globin promoter affects GATA-1 and Oct-1 binding in vitro differently but can independently reproduce the hereditary persistence of fetal hemoglobin phenotype in transgenic mice.

Abstract excerpt

The T to C substitution at position -175 of the gamma-globin gene has been identified in some individuals with non-deletion hereditary persistence of fetal hemoglobin (HPFH). In this study, the HPFH phenotype was reestablished in transgenic mice carrying the mu'LCRAgamma(-175)psibetadeltabeta construct, which contained a 3.1-kb mu'LCR cassette linked to a 29-kb fragment from the Agamma-to beta-globin gene with...

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