A, Northern analysis was carried out on RNA from DY103 (WILD TYPE), DY106 (dst1), DY105 (rpb2–10), and DY108(rpb2–10 dst1) cells treated with 6AU (75 µg/ml) for 30 min before galactose induction. RNA was prepared at the indicated times, and the blot was probed for GAL1 mRNA. Results from three separate experiments were quantitated using a PhosphorImager. GAL1 transcript levels were corrected for background levels of the same area in each sample lane. These values were divided by the maximal level of GAL1 transcript in wild-type cells at 120 min, and the means and standard deviations (error bars) were plotted (B).