Fig. 2.

Amplitude A of the collective glycolytic oscillations as a function of cell density. The open and filled circles correspond to sustained and damped oscillations, respectively, of the NAD(P)H fluorescence relative to the mean fluorescence signal. Cell density is reported as dry weight (dw). The continuous line is a fit with the reduced model (Eq. 5 in Mathematical Model). (Inset) The predicted linear relation between A² and 1/dw. The vertical error bars indicate the maximum and minimum values observed, and the horizontal error bars indicate two independent determinations of cell density. See SI Appendix 1 for data analysis.