Guinamard et al. Vol. 189, No. 9, May 3, 1999. Pages 1461–1466.

Due to a typographical error, the name of the third author was reversed. It appeared as Ishiai Masamichi, and it should be Masamichi Ishiai. The corrected author list appears below. Please note, the author list appears correctly in the HTML and PDF versions of this article.

Rodolphe Guinamard,* Nathalie Signoret, Masamichi Ishiai,§ Mark Marsh, Tomohiro Kurosaki,§ and Jeffrey V. Ravetch*

From the *Laboratory of Molecular Genetics and Immunology, The Rockefeller University, New York 10021; the Medical Research Council Laboratory for Molecular Cell Biology and Department of Biochemistry, University College London, London WC1E 6BT, United Kingdom; and the §Department of Molecular Genetics, Kansai Medical University, Moriguchi, Osaka 570, Japan