Table S1.

Estimated ratio change in the extracellular cAMP level in the presence of exogenous cAMP; A_z = (z_peak + z₀)/(z_basal + z₀)

	z0 = 0, nM	z0 = 0.3, nM	z0 = 1, nM	z0 = 3, nM
1/2 ML	30.0	21.5	13.1	6.6
1/8 ML	30.0	11.9	5.4	2.6
1/32 ML	30.0	4.8	2.2	1.4

Oscillatory (in boldface) and nonoscillatory (in regular font) states experimentally determined (Fig. 1C) are shown.