Table 2:

Age-dependent regulation of ACE2, TMPRSS2 and apoptosis in mouse lung.

Mouse age:		P0-P3 (Neonate)	P7-P15 (Adolescent)	P28-P100 (Young Adult)	P250+ (Late Adult)
Ace2 Lung		Moderate	Low	Moderate	High
ACE2 in Lung Cells	All (DAPI+)	Moderate	Low	Moderate	Very High
	SCGB1A1+	Moderate	Moderate	High	Very High
	PDPN+	Low	Low	Low	Moderate
	AQP3+	Low	Low	Low	Very High
Tmprss2 Lung		Moderate	Low	Moderate	High
Apoptotic Priming		High	High	Moderate	Moderate
BCL-2 Family Gene Expression	Pore-Forming	Low	Moderate	Moderate
	Pro-Apoptotic	High	Moderate	Low
	Pro-Survival	High	Moderate	Moderate