Figure 6.
SWI/SNF specifically functions in S phase to promote Mec1 activity. (A) Western blot analysis of Rad53 phosphorylation in G1 cells. Wild-type (WT) and Δsnf2 cells were arrested in G1 phase with α factor and treated with 4NQO. (B) Western analysis of Rad53 phosphorylation in G2 cells. Wild-type and Δsnf2 cells were arrested in G2 phase with nocodazole and treated with 4NQO. (C) Western analysis of Rad53 phosphorylation in S phase. Wild-type and Δsnf2 cells were arrested in G1 and then released into medium containing 200 mM HU.