Figure 7. Rad9 CDK Site Mutant Is Checkpoint Deficient.
(A) Isogenic strains carrying wild-type Rad9-Flag or Rad9-18A-Flag were α factor arrested, nodocazole arrested, allowed to cycle, or treated with cdc28-as inhibitor 1NM-PP1.
(B) Ddc1-GFP-LacI and Ddc2-GFP-LacI checkpoint fusions were induced in nocodazole-arrested Rad9-Flag and Rad9-18A-Flag strains. Zeocin was added to Rad9-Flag, Rad9-18A-Flag, and rad9Δ strains.
(C) Rad9-Flag, Rad9-18A-Flag, and rad9Δ cycling strains were left untreated or treated with Zeocin at 100 ug/ml, 200 ug/ml, and 2 mg/ml final concentration for 2 hr.