RETRACTION
Volume 34, no. 2, p. 259–270, 2014, https://doi.org/10.1128/MCB.00799-13. We retract this article. After a recent correction of some figures (E. Zehorai and R. Seger, Mol Cell Biol 37:e00215-17, 2017, https://doi.org/10.1128/MCB.00215-17), we were made aware of additional problems, including an extra lane in the gERK panel of Fig. 1C and inappropriate splicing in Fig. 8A. Although these errors do not change the conclusions derived from these figures, we choose to retract this paper in the interest of maintaining accuracy in the published scientific literature. We apologize for these mistakes and any inconvenience they caused.