Genetics. In the article “Conservation of sequence and structure flanking the mouse and human β-globin loci: The β-globin genes are embedded within an array of odorant receptor genes” by Michael Bulger, J. Hikke von Doorninck, Noriko Saitoh, Agnes Telling, Catherine Farrell, M. A. Bender, Gary Felsenfeld, Richard Axel, and Mark Groudine, which appeared in number 9, April 27, 1999 of Proc. Natl. Acad. Sci. USA (96, 5129–5134), the authors request that the following change be noted. Due to a printer’s error, the author’s name, J. Hikke von Doorninck, is misspelled and should be J. Hikke van Doorninck.