The ratio between fluctuactions in the OFF and ON states is mantained at larger volumes.

Relative fluctuations in each steady state for two different nondimensional cell volumes for for the multiplicative noise model. Relative fluctuations have been computed as the ratio between the standard deviation over the mean steady state. Standard deviations and mean values have been extracted from Langevin dynamics as in Fig. 2. As shown, relative fluctuations decrease with cell volume, but are always larger in the OFF state. The ratio between the relative fluctuations in the two states is indicated in the last column. This ratio is little sensitive to the cell volume.