Figure 1.
mad2Δ shortens checkpoint-mediated cell cycle delay after induction of an unrepaired DSB. A) Induction of an irreparable DSB causes a delay in the cell cycle equivalent to 6 doubling times in wild type cells, which is fully eliminated by mec1Δ. mad2Δ reduces arrest in chk1Δ and is epistatic to rad53Δ. B) Response to a DSB in Chr6 is similar to that on Chr3, while a break on Chr11, where the DSB is 200 kb further from its centromere, provokes a significantly shorter Mad2-dependent arrest.
