Correction

APPLIED BIOLOGICAL SCIENCES. For the article “Potent inhibition of huntingtin aggregation and cytotoxicity by a disulfide bond-free single-domain intracellular antibody,” by David W. Colby, YiJia Chu, John P. Cassady, Martin Duennwald, Helen Zazulak, Jack M. Webster, Anne Messer, Susan Lindquist, Vernon Martin Ingram, and K. Dane Wittrup, which appeared in issue 51, December 21, 2004, of Proc. Natl. Acad. Sci. USA (101, 17616-17621; first published December 14, 2004; 10.1073/pnas.0408134101), due to a printer's error, the following information was omitted from the acknowledgments: This work was also supported by funding from the Hereditary Disease Foundation's Cure Huntington's Disease Initiative.