electronic reprint Acta Crystallographica Section D Biological Crystallography ISSN 0907-4449 Editors: E. N. Baker and Z. Dauter The role of substrate-binding groups in the mechanism of aspartate- -semialdehyde dehydrogenase Julio Blanco, Roger A. Moore, Christopher R. Faehnle, David M. Coe and Ronald E. Viola Copyright © International Union of Crystallography Author(s) of this paper may load this reprint on their own web site provided that this cover page is retained. Republication of this article or its storage in electronic databases or the like is not permitted without prior permission in writing from the IUCr. Acta Cryst. (2004). D60, 1388–1395 Blanco et al. Aspartate- -semialdehyde dehydrogenase