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DNase I footprinting of the C/EBPα promoter with rSp1 and rAP2. A 204-bp SmaI-StyI fragment of the C/EBPα promoter (5) was incubated with indicated amounts of rSp1 or rAP-2α and then digested with DNase I. Vertical lines on the right side indicate the footprinted sequences.
