CORRECTION
Volume 56, no. 4, p. 1936–1941, 2012. Page 1938, left column, “Determining NAG activity” paragraph, line 15: After “…405 nm,” the following sentence should be added. “Meanwhile, reaction mixtures without p-nitrophenyl-β-N-acetyl-d-glucosaminide were prepared as a blank correction at OD405.”
Page 1938, right column: Figure 1 should appear as shown below, with corrected values for the Y axis.
FIG 1.
NagZ activity assay of wild-type S. maltophilia KJ and its derived nagZ deletion mutant, KJΔZ, under basal and induced conditions. Cefuroxime (50 µg/ml) was used as the inducer. Results shown are mean values of three experiments ± standard deviations (SD).