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Constructs made with the human PCNA gene. The diagram shows only the constructs made with the gene, but similar constructs were also made with the human PCNA cDNA (see Materials and Methods). Empty boxes: PCNA gene; black boxes: SV40 promoter; white striped boxes: pGEM 3; black striped boxes: SV40 polyadenylation sequence; spotted boxes: PCNA cDNA; black squares: Okayama-Berg vector sequences; Amp: ampicillin resistance gene.
