Fig. 1

N-Acetylglucosaminidase activities in supernatants (extracellular fraction) and crude extracts (cellular fraction) from cultures of C. glutamicum ΔnanR transformed with the indicated plasmids. Data represent means and SD from activity assays conducted on three independent cultivations. All results were tested for significance using the paired heteroscedastic Student’s t-test. The level of significance of the differences observed between the control and test samples was expressed as one, two or three stars, for * p ≤ 0.05, and ** p ≤ 0.01, respectively. “NS” stands for nonsignificant