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- _7 value "High-level, tissue-specific expression of the beta-globin genes requires the presence of an upstream locus control region (LCR). The overall enhancer activity of the beta-globin complex LCR (beta-LCR) is dependent on the integrity of the tandem NF-E2 sites of HS-2. The NF-E2 protein which binds these sites is a heterodimeric basic leucine zipper protein composed of a tissue-specific subunit, p45 NF-E2, and a smaller subunit, p18 NF-E2, that is widely expressed. .... Reduced levels of both alpha- and beta-globin were associated with the lower levels of NF-E2 activity in this cell line. Globin expression was fully restored upon the introduction of a tethered p45-p18 heterodimer. .... From these results, we conclude that NF-E2 is specifically required for high level goblin gene expression in MEL cells." provenance.
- _7 wasQuotedFrom 7623856 provenance.