Vol. 184 No. 6, March 23, 2009. Pages 923–933.
The Tubulin panel in Fig. 3 B in the original version of this figure was a duplicate of the GAPDH panel in Fig. 3 C. The authors have indicated that this was due to a clerical error during figure preparation. A corrected version of Fig. 3 B is shown below.
The html and pdf versions of this article have been corrected. The error remains only in the print version.