VOLUME 287 (2012) PAGES 27629–27636
This article has been withdrawn by the authors. Following concerns raised about potential data manipulation, the University of Basel conducted an internal investigation. This evaluation established that data had been manipulated. Given that the integrity of the manuscript is compromised, the senior author has requested that the article be withdrawn. All authors agreed to the withdrawal. The Journal confirmed that data had been manipulated by determining that in Fig. 2C, features in the tubulin immunoblot were duplicated. Also in Fig. 2C, lanes 1 and 8 of the CHC immunoblot were duplicated.