This article has been retracted by the publisher. Fig. 1B was assembled from a composite of many images. The actin immunoblot from Fig. 2A, right, was reused in Fig. 4A, left. Parts of the actin immunoblot from Fig. 2C, left panel, had been reused in supplemental Fig. 1A. The actin immunoblot from Figs. 2E and 4B, left panels; and supplemental Fig. 1B was reused in Fig. 5B, top panels. Parts of the JNK immunoblot from Fig. 4C were reused in Fig. 7C, JNK panels.
