Fig. 4
From: Characterization of a new L-carnosine synthase mined from deep-sea sediment metagenome
The production performance of L-carnosine by the wild-type and mutants. WT stands for wild-type, and mutants with the respective site-mutation are indicated. Each point represents the average of three data, where the error bars represent the standard deviation. The left Y-axis represents titer and the right Y-axis represents the relative activities. The activity data from that of wild-type (titer, 1.46 ± 0.06 g/L) was set as 100%