Correction

PLANT BIOLOGY. For the article “GIGANTEA is a nuclear protein involved in phytochrome signaling in Arabidopsis” by Enamul Huq, James M. Tepperman, and Peter H. Quail, which appeared in number 17, August 15, 2000, of Proc. Natl. Acad. Sci. USA (97, 9789–9794), the authors wish to make the following correction. The GIGANTEA protein (GI) fused at its COOH terminus to the β-glucuronidase (GUS) marker (GI–GUS fusion) localizes to the nucleus in a manner similar to the converse arrangement, where GUS is fused to the NH₂ terminus of GI (GI–GUS fusion) as reported in this article. This result provides evidence against the possibility, previously left open, that fusion of GUS to the NH₂ terminus of GI interfered with the potential targeting of GI to the plasma membrane by signals requiring a free NH₂ terminus, thereby artifactually redirecting GI to the nucleus.