Figure 6.

Glucan synthesis activity of S. mutans UA159 lacking the ftf gene in the presence and absence of UDMA. The relative cell-associated glucan synthesis activity (a) was measured in homogenized cell pellets, and the relative cell-free glucan synthesis activity (b) was measured in the cellular supernatant. The percentage activities were calculated using the activity at time zero as 100%. DMSO was used as a vehicle for UDMA, and cells grown in the absence of UDMA (2% DMSO) were used as the control. The data are expressed as mean ± standard deviation values. ** p < 0.01; repeated measure ANOVA.