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. 2015 Jan 14;43(3):1955–1964. doi: 10.1093/nar/gku1388

Figure 1.

Figure 1.

The amplification of ligand-responsive TF controlled gene expression via tuning of the density of intracellular receptors. The output characteristics of the signaling promoter (PL) can be significantly tuned by altering the density of its cognate ligand-responsive receptor for transcriptional control in bacterial cells. KM is the inducer concentration achieving half-maximal activation of the target PL promoter (in orange).