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Binding of radiolabeled probe is also competed by other MAR-containing plasmids. Mobility shift reactions were performed exactly as described in Figure 4, except increasing amounts of a 671 bp human HGPRT MAR plasmid (A) or a 623 bp mouse Igk MAR plasmid (B) were used. The position of pUC18 and MAR plasmids are indicated by black arrow and white arrows, respectively.
