Fig. 1: Schematic illustration of a TR controlling expression of a metabolic cluster of genes.
From: A genome-wide approach for identification and characterisation of metabolite-inducible systems
The primary substrate was proposed to be the ligand (light blue diamond). Note that the enzyme that converts the primary substrate into an intermediate product (grey regular pentagon) may be encoded by any of the genes in the operon. TR gene and protein are shown as green left arrow and pie, respectively. Metabolic cluster genes are yellow and orange right arrows. Product of metabolic conversion is shown as an orange octagon.
