This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the authors. It contained multiple inaccurate and inappropriately processed Western Blots. Some Figure panels of this article were also found in a second paper from the same group (Yuan et al. BBA General Subjects (2013) 1830, 4907–4916) that has also been retracted. The corresponding author has taken full responsibility and apologizes to the readers of BBA General Subjects for submitting and publishing the erroneous article and any inconvenience caused.