Tup1 promotes H2A.Z incorporation and H3K4me2 modification during GAL memory. (A and C) H2A.Z ChIP in WT and tup1∆ cells under repressing (glucose) and memory (galactose → glucose, 12 hr) conditions (A) or under repressing conditions with PADH-GAL1 (C). The recovered DNA fragments in IP were analyzed for sequences arising from the GAL1 promoter, PRM1 coding sequence (negative control), and BUD3 promoter (positive control) and plotted relative to input fraction. (B and D) H3K4me2 ChIP in WT and tup1∆ cells, performed as described in (A and C). Error bars represent SEM from at least three independent replicates. * P ≤ 0.05 (Student’s t-test) relative to the repressing condition. cds, coding sequence; ChIP, chromatin immunoprecipitation; H3K4me2, histone 3 dimethyl lysine 4; IP, immunoprecipitation; pro, promoter; qPCR, quantitative PCR; WT, wild type.