CHEMISTRY, GENETICS. For the article “Genomewide studies of histone deacetylase function in yeast” by Bradley E. Bernstein, Jeffrey K. Tong, and Stuart L. Schreiber, which appeared in number 25, December 5, 2000, of Proc. Natl. Acad. Sci. USA (97, 13708–13713; First Published November 28, 2000; 10.1073/pnas.250477697), the authors note the following corrections. As a result of an error at the proof stage, there is a shift in the references. Ref. nos. 9–16 and 31–34 in the text should be 10–17 and 30–33, respectively.