Fig. 1From: Proteome analysis guided genetic engineering of Corynebacterium glutamicum S9114 for tween 40-triggered improvement in l-ornithine productionEffect of tween 40 addition on cell growth and l-ornithine production. a Optimizing the temporal points of tween 40 addition. b Optimizing tween 40 addition concentration. Gray bar represents OD600, blue bar represents l-ornithine concentration. Results of standard deviations present in three individual experiments. *P < 0.05, **P < 0.01Back to article page