TABLE 1.

Relative expression of P2 receptors in acutely isolated, primary cultured microglia, and BV2 cells in relative scale. Reported receptor mRNA expression is normalized to the expression level (mRNA count) found in primary cultured microglia and are incorporated in our model as scaling factors for receptor concentration (ρ _P2X4 , ρ _P2X7 , ρ _P2Y2 , and ρ _P2Y12 ). *The mRNA expression was acquired from the comparison between cultured mouse microglia and BV2 cells (He et al., 2018).

Receptors	mRNA expression
	Primary	BV2*
P2X4	1×	0.18×
P2X7	1×	0.65×
P2Y2	1×	1.02×
P2Y12	1×	0.030×