Correction

GENETICS. For the article “Highly efficient gene replacements in Neurospora strains deficient for nonhomologous end-joining,” by Yuuko Ninomiya, Keiichiro Suzuki, Chizu Ishii, and Hirokazu Inoue, which appeared in issue 33, August 17, 2004, of Proc. Natl. Acad. Sci. USA (101, 12248-12253; first published August 6, 2004; 10.1073/pnas.0402780101), the authors note that the agent used to select for transformants was bialaphos rather than blasticidin. The word “blasticidin” should therefore be replaced by “bialaphos” throughout the text. This error does not affect the conclusions of the article or applications of the method.