  Synthetic genetic circuits are implemented in living cells for their
operation. During gene expression, proteins are produced from the respective
genes, by formation of complexes through the process of transcription and
translation. In transcription the circuit uses RNAP, etc. as resource from the
host cell and in translation, ribosome, tRNA and other cellular resources are
supplied to the operating circuit. As the cell contains these resources in
limited number, the circuit can suffer from unprecedented resource competition
which might destroy the circuit functionality, or introduce some emergent
responses. In this paper, we have studied a three-gene motif under resource
competition where interesting behaviour, similar to regulatory responses occur
due to limited supply of necessary resources. The system of interest exhibits
prominent changes in behaviour which can be observed experimentally. We focus
on two specific aspects, namely, dynamic range and half-induction point, which
inherently describe the circuit functionalities, and can be affected by
corresponding resource affinity and availability.
