BIOCHEMISTRY. For the article “Crystal structure of a DEAD box protein from the hyperthermophile Methanococcus jannaschii” by Randall M. Story, Hong Li, and John N. Abelson, which appeared in number 4, February 13, 2001, of Proc. Natl. Acad. Sci. USA (98, 1465–1470), the authors note the following. The data deposition code for this article was incorrectly set as 1HVs instead of 1HV8. The online version of this article has been corrected.