agricultural sciences. For the article “Genetic engineering of the glyoxalase pathway in tobacco leads to enhanced salinity tolerance,” by S. L. Singla-Pareek, M. K. Reddy, and S. K. Sopory, which appeared in issue 25, December 9, 2003, of Proc. Natl. Acad. Sci. USA (100, 14672–14677; first published November 24, 2003, 10.1073/pnas.2034667100), the authors note that the following statement should be added to the acknowledgments: “We thank Drs. B. Porter and F. White for the initial glyoxalase II clone.”