Before revision: We study the  stochastic oscillations in protein number dynamics of  the three-component negative feedback transcription regulatory system called the repressilator . We quantify the degree of fluctuations in oscillation periods and amplitudes, as well as the noise propagation along the regulatory cascade using the exact stochastic simulations with the Gillespie algorithm in the stable oscillation regime  .
After revision: We study the stochastic oscillations in protein number dynamics of the three-component negative feedback transcription regulatory system called the repressilator as a prototypical example, we quantify the degree of fluctuations in oscillation periods and amplitudes, as well as the noise propagation along the regulatory cascade using the exact stochastic simulations with the Gillespie algorithm in the stable oscillation regime .