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