RETRACTION
Volume 66, no. 9, p. 4531–4536, 1998, https://doi.org/10.1128/iai.66.9.4531-4536.1998. The authors hereby retract this article. The authors have been alerted that Figure 6 does not accurately reflect the experimental data. Specifically, the left and right panels for the iap probe contain a duplicated blot purporting to represent different samples.
The third author assumes all responsibility for this anomaly. Since the original blots are no longer available, it is not possible to submit a corrected figure.
The authors sincerely regret this problem necessitating retraction of this article.