Fig. 3From: Developing a high-throughput screening method for threonine overproduction based on an artificial promoterThe fluorescence signals of ThrH(pTZL2) and ThrL(pTZL2) cells at different fermentation times. A and a 0 h; B and b 10 h. C and c 24 h. The fluorescence signals of ThrL(pTZL2) were shown in red, while those of ThrH(pTZL2) were shown in green.Back to article page