VOLUME 281 (2006) PAGES 6718–6725
This article has been retracted by the publisher.
An investigation by the Office of Research Integrity determined that falsified Western blots were included in Figs. 1B and 2A, and falsified quantification of Western blots was included in Figs. 1B, 2A, and 3A (https://federalregister.gov/a/2013–01454).