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The proximal promoter of the telomerase RNA gene, hTR, contains four Sp1 sites and one CCAAT box. We have carried out a functional analysis of the role of these sequence elements. Two Sp1 sites downstream of the CCAAT box mediated negative regulation, while the other two Sp1 sites were positive regulators with the strongest effect mediated by the negative regulatory Sp1 site closely flanking the CCAAT...
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