VOLUME 278 (2003) PAGES 3671–3678
This article has been withdrawn by the authors upon request from the Journal. The Journal raised questions regarding Figs. 3 and 4A. The authors were able to locate original data for some panels, and for the others, the authors state that new experiments were performed. The authors assert that all of the results reported in this article are valid, some of which have been validated in the literature by different groups (e.g. Choi et al. (2011) Autophagy 7, 1052; Hemelaar et al. (2003) J. Biol. Chem. 278, 51841; Shu et al. (2010) Autophagy 6, 936; Tanida et al. (2004) Int. J. Biochem. Cell. Biol. 36, 2503).