passages.id: 1.0alpha7.train.25.sent
passages.type: sentence
passages.text: This site has been shown to be differentially protected by TGF-β treatment in experiments of DNA footprinting (data not shown), and in vivo positioning of Sp1 using the PINPOINT technique maps the Sp1 binding site over the predicted consensus sequence on endoglin promoter (Fig. 2 A). 
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