Volume 446 (issue 1), 2012, pp. 23–36Following an investigation by Nanyang Technological University (NTU), instances of falsification of Western blot data by the first author, Sudarsanareddy Lokireddy, have been reported. Following the outcome of the investigation, the senior author and co-authors retract this paper. The Journal has been unable to contact Sudarsanareddy Lokireddy, and he has not agreed to the retraction.