Before revision:  We also relax the Gaussian assumption, and consider the more biologically relevant log-normal noise. We find that in contrast to Gaussian noise, log-normal noise leads to noise-induced transitions, with the system becoming bimodal. We emphasize that no feedback loops are present in the system, and therefore our findings identify a novel class of noise-induced transitions , based on both features of noise nonlinearity and boundedness .
After revision:  We also present a derivation of it, which highlights its dynamical origin. Testing the methodology on the repressed gene confirms that the emergence of noise-induced transitions , based on both features of noise nonlinearity and boundedness .