Biochemistry. In the article “The Med1 subunit of the yeast mediator complex is involved in both transcriptional activation and repression” by Darius Balciunas, Cecilia Gälman, Hans Ronne, and Stefan Björklund, which appeared in number 2, January 19, 1999, of Proc. Natl. Acad. Sci. USA (96, 376–381), due to a printer’s error, the affiliation symbols were incorrect. The correct author line, affiliation line, and address footnotes appear below.

Darius Balciunas*^†, Cecilia Gälman^‡§, Hans Ronne*^†, and Stefan Björklund^‡¶

^‡ Department of Medical Biochemistry and Biophysics, Umeå University, S-901 87 Umeå, Sweden; and *Department of Medical Biochemistry and Microbiology, Uppsala University Biomedical Center, Box 582, 751 23 Uppsala, Sweden

^† Present address: Department of Plant Biology, Uppsala Genetic Center, Swedish University of Agricultural Sciences, Box 7080, S-75007 Uppsala, Sweden.

^§ Present address: CNT, Karolinska Institute at NOVUM, 141 57 Huddinge, Sweden.

^¶ To whom reprint requests should be addressed. e-mail: ste@panther.cmb.umu.se.