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. Author manuscript; available in PMC: 2006 Apr 10.
Published in final edited form as: Oral Microbiol Immunol. 2002 Aug;17(4):245–251. doi: 10.1034/j.1399-302x.2002.170407.x

Fig. 2.

Fig. 2

Comparison of the effects of sonic extract from A. actinomycetemcomitans UP54 (invasion positive, CDT+) and UP57 (invasion negative, CDT−) on KB cells. Cells were exposed to sonic extract ranging from 0.006 to 6.0 ng (UP54) and 0.006 ng to 6.0 μg (UP57) of total protein for 6 days. Experiments were performed in six-well plates, in triplicate, and stained colonies were counted by an automated system. Untreated KB cell cultures were used to obtain values for 100% survival (100 ± 15.2). X-axis units are in ng of protein/1000 cells.