Figure 1From: Optimization of the Lactococcus lactis nisin-controlled gene expression system NICE for industrial applicationsSchematic overview of the NICE system, its components and its function. NisK and NisR are the sensor protein and the response regulator, respectively. The product of the expressed gene can either accumulate in the cell or be secreted into the extracellular medium depending on the presence of a signal sequence in the construct.Back to article page