RETRACTION
Volume 77, no. 3, p. 1031–1043, 2009, https://doi.org/10.1128/IAI.01192-08. The publisher hereby retracts this article. Questions have been raised by concerned readers about the integrity of the data. The American Society for Microbiology has reviewed the figures and confirmed evidence of apparent duplication of cell images and Western blot bands in Fig. 1C, 2D, 5A, and 5B. Since the integrity of the data as presented was compromised, this publication is retracted in its entirety. We apologize to the readers of Infection and Immunity and regret any inconvenience that this causes.