Before revision:  To compare the impact of the uniform random distribution of DCs (R-system) and the non-uniform distribution in  form of random Gaussian-clusters (G-system), we chose inhibitor as the control parameter.
After revision:  To compare the impact of the uniform random distribution of DCs (R-system) and the non-uniform distribution in the form of random Gaussian-clusters (G-system), we chose inhibitor as the control parameter.