PLANT BIOLOGY. For the article “A specific form of thioredoxin h occurs in plant mitochondria and regulates the alternative oxidase,” by Eric Gelhaye, Nicolas Rouhier, Joelle Gérard, Yves Jolivet, José Gualberto, Nicolas Navrot, Per-Ingvard Ohlsson, Gunnar Wingsle, Masakazu Hirasawa, David B. Knaff, Hongmei Wang, Pierre Dizengremel, Yves Meyer, and Jean-Pierre Jacquot, which appeared in issue 40, October 5, 2004, of Proc. Natl. Acad. Sci. USA (101, 14545–14550; first published September 22, 2004; 10.1073/pnas.0405282101), the authors note that the following funding acknowledgment was omitted from the article: “We acknowledge support from the Welch Foundation (Grant D-0710).”