Fig. 4

Effects of urease expression on GlcNAc fermentation. a Expression of urease were controlled by the exponential phage dependent promoters (PabrB and Phag) and middle-log phage dependent promoters (PabrB and Phag), respectively. Effects of urease expression on urea utilization (b), pH (c), cell growth (dry cell weight, DCW) (d) and GlcNAc production (e)