Construct: mus209+tTa in which the two putative E2F binding sites upstream of the mus209 transcriptional start have been mutated (TATCCCGCtcaTTAGCCCG to TcgCaaGCtcatTTctCaaG (binding site sequences in capitals)).
PCNAtΔsIsII partially rescues PCNA775/Df(2R)173
PCNAtΔsIsII partially rescues PCNAD-292/Df(2R)173